France follows Britain and US in shutting Yemen embassy

France has become the third Western nation to shut its Yemen embassy, after threats from an al-Qaeda offshoot, the foreign ministry in Paris announced.

The US and UK missions, which closed on Sunday, remain shut.

Reports that the closures were prompted by Yemeni security forces losing track of six trucks full of arms were denied by British officials.

Al-Qaeda in the Arabian Peninsula last week said it was behind an alleged plot to bomb a US airliner.

It urged attacks on "crusaders" in embassies.

US Secretary of State Hillary Clinton said Yemen was a threat both regionally and globally.

Threats to US interests in Yemen pre-dated the Christmas holiday period, and the embassy would be re-opened only when circumstances permitted, she said in Washington.

From Monday all travellers flying to America are being subjected to new security measures, introduced by the US government.

Airport staff will now carry out extra screening of people from 14 countries, including those the US considers to be state-sponsors of terrorism - Cuba, Iran, Sudan and Syria.

Yemen and Nigeria - through which the alleged bomber travelled - also face the new restrictions.

Passengers flying from other countries will be checked at random.

On Monday in Paris, French foreign ministry spokesman Bernard Valero told reporters their Yemen ambassador had decided the previous day to suspend public access to the embassy.

French citizens in the country had been warned to be vigilant and limit their movements, he added.

The US was the first to announce the closure of its embassy on Sunday, citing "ongoing threats" by al-Qaeda in the Arabian Peninsula (AQAP), and the UK followed suit.

A US diplomat told the Reuters news agency on Monday: "The embassy is still closed again today... We are continuing to make the security review."

The Japanese foreign ministry said consular services had been suspended at its embassy in Yemen but other business was continuing, AFP news agency reported.

The German foreign ministry confirmed security had been tightened at its mission but that the embassy remained open

Spain restricted public access to its embassy.

The Yemeni authorities have tightened security measures at Sanaa's airport, as well as around several other embassies.

Yemeni security forces, meanwhile, shot dead two militants north of the capital, Sanaa, said officials.

The US embassy was the target of an attack in September 2008 in which 19 people died, including a young American woman. The attack was blamed on AQAP.

On Sunday, the US deputy national security adviser for homeland security and counter-terrorism said there were "indications that al-Qaeda is planning to carry out an attack against a target inside of Sanaa, possibly our embassy".

John Brennan told ABC the group had "several hundred members" in Yemen and Saudi Arabia, and was posing an increasing threat.

Last week, AQAP urged Muslims to help in "killing every crusader who works at their embassies or other places".

The group also said it was behind an alleged failed attempt to destroy an Amsterdam-Detroit flight with nearly 300 people aboard on Christmas Day.

Mr Brennan told CNN there were "indications" a radical US cleric of Yemeni origin had links both to the Nigerian charged with the bomb plot, and the man accused of November's shootings at a Texas military base.

He said the preacher, Anwar al-Awlaki, had had contact with Umar Farouk Abdulmutallab, while he was allegedly being trained by AQAP operatives last year.

It was clear, he said, that Mr Awlaki had also been in touch with Nidal Malik Hasan, the US Army major charged with shooting dead 13 people at Fort Hood.

On Saturday, the head of US Central Command, Gen David Petraeus, visited Yemen's President Ali Abdallah Saleh to pledge support for its fight with al-Qaeda, after Washington doubled its counter-terrorism aid.

Yemeni officials last week said they had sent more troops to hunt down al-Qaeda militants in the provinces of Abyan, Baida and Shabwa.

Correspondents say the security situation in Yemen is complicated by an abundance of firearms, an insurgency in the north and a secessionist movement in the south.

But the prospects of re-asserting central government authority over the lawless areas where al-Qaeda is based look, in the opinion of some analysts, remote - even with beefed-up American support.

US aware 'Nigerian' prepared for terror attack

The US was aware that "a Nigerian" in Yemen was being prepared for a terrorist attack - weeks before an attempted bombing on a US plane.

ABC News and the New York Times say there was intelligence to this effect, but its source is unclear.

Umar Farouk Abdulmutallab flew from Lagos to Amsterdam before changing planes for a flight to Detroit on which he allegedly tried to detonate a bomb.

The Netherlands is to introduce body scanners on US flights within weeks.

Dutch Interior Minister Guusje Ter Horst said Mr Abdulmutallab did not raise any concerns as he passed through Amsterdam's Schiphol Airport to board the flight.

She said the airport would be able to use body scanners on all flights to the US from the airport in three weeks. Nigerian authorities also said they would start using the machines next year.

Obama denounces lapses

Ms Ter Horst said that though the US had previously not wanted the scanners to be used because of privacy concerns, Washington had now agreed that "all possible measures will be used on flights to the US".

"It is not exaggerating to say the world has escaped a disaster," she said.

US President Barack Obama has acknowledged unacceptable security failures.

He said a systemic failure allowed Mr Abdulmutallab, a Nigerian, to fly to the US on 25 December despite family members warning officials in November that he had extremist views.

The source of the intelligence about "a Nigerian" in Yemen was reported as coming from the Yemeni government or from US intercept intelligence, which can refer to intercepted e-mail and phone calls.

Mr Obama said he wanted to know why a warning weeks ago from Mr Abdulmutallab's father did not lead to the accused being placed on a no-fly list.

"We need to learn from this episode and act quickly to fix flaws in the system," Mr Obama said.

Some passengers and crew tackled Mr Abdulmutallab in his seat about 20 minutes before landing in Detroit as he allegedly tried to detonate explosives in his underwear.

Initial investigations found he had used the explosive PETN and a syringe filled with liquid.

The Dutch interior minister described the bomb as professionally made but executed in an "amateurish" way.

She said Mr Abdulmutallab had passed through standard security checks, including a metal detector and a hand baggage scan, without raising suspicions.

Nigerian airports 'safe'

Mr Abdulmutallab has reportedly told investigators that he trained in Yemen with al-Qaeda.

He was living in Yemen from August to early December, the foreign ministry said, according to an earlier report from the official Saba news agency.

He had a visa to study Arabic at an institute in the capital, Sanaa.