US accused of carrying out 'war crimes' in Yemen and Pakistan in major drone report
The Foreign Office has updated the travel advice for countries in the Middle East in response to the increased threat in the region.
A suicide bomber in army uniform killed more than 90 soldiers in Yemen during a the rehearsal for a military parade.
The family of a British man who has been released after being held hostage in Yemen have asked for privacy as they wait to be reunited.
A Foreign Office spokesman said Mike Harvey was released after the Yemeni government engaged with tribal intermediaries.
He added: "We are grateful to the government for their efforts and support."
The teacher was abducted on his way from an educational institute on February 12.
British national Mike Harvey has been safely released after being held hostage in the Yemeni capital Sanaa since February, the Foreign Office has said.
Thirty-seven al Qaeda militants have been killed in fighting with the army in southern Yemen, the country's state news agency Saba has reported.
A military source quoted said most of those killed were Saudis, Afghans, Somalis and Chechens, while a number of the militants' vehicles and weapons were destroyed during the fighting in Shabwa province.
A number of suspected al Qaeda militants have been killed in air strikes on their training camps in southern Yemen.
The defence ministry said the air strike hit camps in the mountainous region between al-Mahfad in Abyan province and Azzan in Shabwa.
The attack follows the killing of 10 suspected militants yesterday.
An airstrike has killed ten suspended al Qaeda militants in central Yemen province, according to security forces.
Twenty soldiers have been killed in an attack on a military checkpoint in eastern Yemen, Reuters has reported, citing the Yemeni state news agency.
An attack on Yemen's ministry of defence has killing 52 doctors and nurses, authorities have said.
A relative of Yemeni president Abd-Rabbu Mansour Hadi was also among those killed in Thursday's attack.
A suicide bomber and gunmen wearing army uniforms targeted the ministry compound in the capital Sanaa in the worst single attack in the country for 18 months.
Yemen's Higher Security Committee said some of those killed were Germans, but it did not give any further details on the number of officers and gunmen dead.
Yemeni and US officials have denied reports that the US embassy in Yemen has been attacked, after reports that a loud blast and gunfire was heard near the facility.
Two Yemeni security officials had earlier contacted the Associated Press to report a large explosion and heavy gunfire near the embassy in the capital Sanaa.
Mohammed al-Mawri, an official at the Yemeni Interior Minister's office, said the explosion was fireworks from a wedding procession and that police had since detained the individuals who lit them.
The US state department said it had no indication that reports of an explosion and sounds of gunfire near the embassy were accurate.
A large explosion and heavy gunfire has been heard near the US Embassy in Sanaa, the Associated Press has reported citing Yemeni security officials.