Turkish security forces have arrested a gunman who stormed an office of Turkey's ruling Justice and Development Party (AKP) in Istanbul.
Special Forces intervened shortly after the armed man wearing a military-style jacket entered the seven storey-building in the Kartal district.
Footage from the scene showed the intruder emerging from a broken window on the top floor, as a large number of police cars were deployed in the street outside. The man could be seen addressing onlookers after flying a Turkish flag with a sword on it.
He had previously demanded that all those inside the building should leave, local media reported.
It was not immediately clear whether a second gunman was involved, as suggested by earlier reports.
The incident comes a day after two leftist-gunmen were killed during a shootout with security forces after they took hostage a prosecutor for the case of Berkin Elvan, a teenager killed after being hit by a gas canister in the head during Gezi Park anti-government protests in 2013.
It was not immediately clear whether the two incidents were connected.
AKP is the party of the country's conservative president Recep Tayyip Erdogan.