Yemeni police authorities are interrogating a Jordanian man suspected of being behind an attack a US embassy car with a hand grenade in Sana'a two day ago, a security source said on Friday, reported dpa .
"A Jordanian mechanic is being interrogated over the attack on a US embassy vehicle," the source, who asked anonymity, told the German Press Agency dpa.
He said a police patrol captured the man after the attack that occurred in the up-scale neighbourhood of Hadda in the south of the capital late Wednesday.
The US State Department said on its website that four American embassy personnel were in the vehicle, and that no one was injured in the attack.
The motives behind the attack are not clear yet.
On Thursday, the US embassy in Sana'a issued a security warning to US citizens in Yemen after the attack that it said targeted "foreigners".