The government said in a statement that two officers also died when anti-terrorism units raided an al-Qaeda hideout and a car bomb-making facility in Bayt al-Adhari and Bani Hakam districts, in the Arhab region, and fought a gun battle with its occupants.

Two officers were also wounded. Security forces also conducted two other separate raids in downtown Sanaa, the statement said, but gave no details.

The raids were part of an escalating campaign against militants responsible for a wave of attacks across the country.

"The forces exchanged fire with the wanted men who were holed up inside a house," a government official, who asked to remain anonymous, told Reuters.

"Five were killed and four were captured." The government statement, received by email, said one of the dead militants was Saleh al-Tais, who it said was involved in the January killing of Ahmad Sharafeddin, a delegate at national reconciliation talks representing the Shi'ite Muslim Houthi group and a former dean of the law faculty at Sanaa University.

One of 25 people listed by the Interior Ministry's most wanted list, Tais was the operational commander of Al Qaeda in the Arabian Peninsula (AQAP) in Sanaa who had a 5 million riyal ($25,000) bounty for his capture, the statement said.

Tais, who had evaded capture more than once in the past, was involved in a number of major attacks, including an attack on the Yemeni Defense Ministry compound in Sanaa last December and the assault on the Central prison last February, it said.

"Tais was also linked to a number of terrorist operations that targeted national and foreign interests, particularly the cold-blooded assassination campaign targeting security personnel in the Yemeni capital," it said.

Explosives, car bombs and heavy weapons were found during the raid.

The stability of Yemen, which shares a long border with the world's top oil exporter, Saudi Arabia, is an international concern.

NJF/NJF