A car bomb targeting security forces in southern Yemen has killed two people and wounded 13 others, officials say.
They said the bomb was planted in a police officer's car and parked near a security building in the town of Daleh.
Southern Yemen is the site of frequent unrest by separatist rebels who complain of discrimination by the central government in Sanaa.
The country is at the heart of a global security alert after two bombs were discovered on US-bound flights.
The bombs, sent via air freight to Chicago, were intercepted in Dubai and the UK last week.
Al-Qaeda in the Arabian Peninsula (AQAP) has said it was behind the parcel bomb plot.
Officials said no group has claimed responsibility for Thursday's attack in the southern town of Daleh, which tore through a marketplace near the local security headquarters.
At least two soldiers were thought to be among the dead and wounded, officials said.
The former North and South Yemen formally united in 1990 but some in the south, where many of Yemen's oil facilities are located, complain that north Yemenis hold most of the key positions in local government, and that the bulk of the country's oil revenues go to Sanaa.
The government denies the charges.