The Cihan news agency said those involved in the attack on the building in Istanbul's Sariyer district included one man and one woman, Reuters reported adding that it could not immediately confirm the reports.
CNN Turk said there were no casualties.
The attack came hours after an explosion early Monday at a police station in Istanbul killed three and injured 10, including 7 police officers.
Turkey has been in a heightened state of alert since it launched what officials described as a "synchronized war on terror" last month, including airstrikes against ISIL fighters in Syria and Kurdish militants in northern Iraq, and the detention of hundreds of suspects at home.
US diplomatic missions have been targeted in Turkey in the past.
The far-leftist Revolutionary People's Liberation Army-Front (DHKP-C), whose members are among those detained in recent weeks, claimed responsibility for a suicide bombing at the US embassy in Ankara in 2013 which killed a Turkish security guard.