This doesn’t sound like any organized al Qaeda-Yemen operation…shooting at an army vehicle and running away. Of course, a number of checkpoints have been attacked as well lately, which AQ apparently later claimed credit for. The “bomb” is more likely a grenade. There are plenty in Mareb sympathetic to al Qaeda and hostile to the central and provincial authority, so it’s not surprising that a threat/eulogy would be sent out. Additionally, the tribes have learned by now that any mention of al Qaeda is a good way to get attention. I could be wrong, but I’m not convinced.
UPDATE: almotamar.net confirms the “explosion.”
Al Qaeda threatens leadership in Mareb: One soldier killed in Mareb
السبت 12 إبريل-نيسان 2008 / Mareb Press
One soldier was killed on Saturday by unknown men on Safer road in Mareb province.
The attackers opened fire on an army vehicle leading to the death of one solider. The attackers were able to run away.
The security apparatus are still search and investigating to know the attackers.
On other hand, unknown men threw a bomb on the building of the Command of Middle Region causing no casualties.
It’s worth mentioning that the building of the Command of Middle Region was exposed to a number of attacks during the last months. The attacks allegedly carried out by Al Qaeda. The attack occurred during day time not at night as usual.
Unknown men have distributed publications threatening the leadership and social figures in Mareb with death for being involved, as they claimed, in killing four Al Qaeda men.
The publications which include poems also praise and lament the four Al Qaeda men.