Assailants fire shots at police guarding popular tourist site in Istanbul
Assailants have fired shots at the police who guard Istanbul's Dolmabache Palace - an Ottoman-era palace that is a major tourist attraction, according to reports.
The Dogan news agency said that no one was hurt in the attack and the two assailants were quickly caught.
Police in Istanbul had no immediate comment on the report.
The incident comes amid an escalation of violence between Turkey's security forces and Kurdish rebels and as Turkey has been conducting operations against terror groups including the Islamic State group.
Turkey has rounded up more than 1,000 people linked to IS, the Kurdish rebels and leftist militants.