Updated

A Syrian opposition party says authorities have detained a prominent Damascus-based writer and dissident as he was trying to leave the country.

The party, Building the Syrian State, says security services arrested Louay Hussein at the Syria-Lebanon border Wednesday as he was heading to Spain to visit his family.

Hussein has a lengthy history in Syria as a writer and opposition activist. He is also the head of the BSS, which is one of the few domestic opposition parties tolerated by President Bashar Assad's government.

The party says this is the third time Syrian authorities have arrested Hussein — and the second since the anti-Assad uprising began in 2011.

The Britain-based Syrian Observatory for Human Rights also reported Hussein's arrest, saying he was taken to the justice palace in Damascus.