The US state department
has told citizens and non-emergency government staff to leave Yemen
"immediately" due to security threats.
It comes after the sudden closure of 20 US embassies and consulates on Sunday.This was prompted by intercepted conversations between two senior al-Qaeda figures, including top leader Ayman al-Zawahiri, US media said.
Meanwhile the UK Foreign office says it has withdrawn embassy staff from Yemen and advises against all travel there.
The US earlier said the closures in North Africa and the Middle East were "out of an abundance of caution".
'Extremely high' A global travel alert issued on Tuesday said: "The US Department of State warns US citizens of the high security threat level in Yemen due to terrorist activities and civil unrest."
"The department urges US citizens to defer
travel to Yemen and those US citizens currently living in Yemen to
depart immediately."
It added that "the security threat level in Yemen is extremely high".The Pentagon says the US Air Force is flying embassy staff out of Sanaa.
It comes hours after a drone strike reportedly killed four suspected al-Qaeda militants in the country.
The BBC's Abdullah Ghorab, in Sanaa, says the Yemeni capital has been experiencing unprecedented security measures, with hundreds of armoured military vehicles deployed to secure the presidential palace, vital infrastructural buildings and Western embassies in the capital.
Our correspondent says that a security source confirmed that Yemeni intelligence services had discovered that dozens of al-Qaeda members had arrived in Sanaa over the past few days from other regions in preparation for the implementation of a large plot.
The source described the plot as dangerous, and suggested it was to include explosions and suicide attacks aimed at Western ambassadors and foreign embassies in Yemen, in addition to operations aimed at the Yemeni military headquarters.
Both the White House and the US state department have said the current threat comes from al-Qaeda in the Arabian Peninsula (AQAP), but have refused to divulge further details.
According to the New York Times, the US intercepted communications between Zawahiri and the group's head in Yemen, Nasser al-Wuhayshi.
The paper said the conversation represented one of the most serious plots since the 9/11 attacks.
Jail breaks A number of US diplomatic posts in the region - including in the Yemeni capital Sanaa - will remain closed until Saturday.
Ayman al-Zawahiri is said have discussed a high level terror plot
In a statement on its website, the UK Foreign Office said: "Due
to increased security concerns, all staff in the British embassy have
been temporarily withdrawn and the embassy will remain closed until
staff are able to return."Several European countries have also temporarily shut missions in Yemen.
Officials have advised particular vigilance during the festival period surrounding Eid - the end of the Muslim holy month of Ramadan - warning that "tensions could be heightened". It begins on Wednesday.
Meanwhile, Interpol issued a separate global security alert at the weekend, citing jail breaks linked to al-Qaeda in nine countries.
The international policing organisation said "hundreds of terrorists" had been freed during breakouts in countries including Iraq, Libya and Pakistan in the past month.
A US state department global travel alert, issued last week, is also in force until the end of August.
In its latest statement, the department referred to previous attacks on US embassies, including the storming of its compound in Yemen in September 2012.
Earlier that month, mob attacks on the US consulate in the Libyan city of Benghazi had left US ambassador Chris Stevens and three other Americans dead.
Meanwhile, officials in Yemen released the names of 25 al-Qaeda suspects, saying they had been planning attacks targeting "foreign offices and organisations and Yemeni installations" in the capital of Sanaa and other cities across the country.
AQAP, the Yemeni branch of al-Qaeda, has also been blamed for the foiled Christmas Day 2009 effort to bomb an airliner over Detroit and for explosives-laden parcels that were intercepted the following year aboard cargo flights.
Seven suspected al-Qaeda militants were killed in two US drone air strikes in southern Yemen in June, officials say.
| C |
|---|