Security sources in Dhale Province said on Wednesday the southern separatist movement was behind the suicide attack against the police headquarters that injured 9 policemen, two seriously.
The Alsahwa website quoted the sources as saying elements from the movement asked the owner of a motorbike to deliver food for a detainee at the building and the meal was an improvised explosive device that was set off when the motorcyclist arrived at the building.
However, the sources revealed the motorcyclist was a soldier from Sana'a Province and his motorbike was packed with explosives while he was shopping in the Dhale market.
Saleh Ali Hadi was one of the personnel at the armored brigade 35, they said.
On Tuesday, the authorities said 8 policemen were wounded when the motorbike exploded at the gate of the police office. The office suffered damages as well.
Initially, they said the attack bore the hallmarks of Al-Qaeda in the Arabian Peninsula which claimed responsibility for recent attacks against offices of public security and intelligence in the south.
But other sources dismissed Al-Qaeda had been behind the bombing, saying the bomber might be used by another group that put explosives in his motorbike.