BBC News with Debora MacKenzie.

A number of foreign embassies in Yemen remain closed or have restricted public access as the caution against possible attacks by Al-Qaeda linked militants. The closures were initially announced for a day or so, but the American Secretary of State Hilary Clinton now says the US embassy will remain closed until security conditions permit. From Yemen, here is Johnathan Head.

There were more armed police on the road leading to the main airport in Sanaa this morning and heavily fortified American embassy remained closed along with the British and French missions. The government here believes that it foiled a lot of plots to detonate multiple car bombs outside western targets last month. But not all the plotters were caught. It responded quickly to the demands for action, reporting an operation this morning in which two militants were killed, that simply increasing attacks on suspected Al-Qeada cells is a risky strategy.

Nigeria says it unjust for the United States to subject travellers to the US on flights from Nigeria to special scrutiny before boarding. The measures followed the alleged attempt by a Nigerian national to mount a suicide bombing on a plane approaching Detroit on Christmas Day. Mark Doyle reports from Nigeria.

The Nigerian Information Minister Dora Akunyili told BBC it was unfair to stigmatize the whole of Nigera's population because the actions of one man. She stressed fact that Umar Farouk Abdulmatallab had not been trained or recruited by Al-Qaeda inside Nigeria. Nigerians in general outraged that their country had been portrayed in some circles similar to failed states, such as Somalia.