Police officers in Northern Ireland escaped injury when their vehicle was struck by what is believed to be an explosive device.
The attack happened in the sectarian interface area of Twaddell Avenue in North Belfast.
The road has been closed while the Police Service of Northern Ireland (PSNI) examines the scene.
A spokesman for the force said: "A police vehicle was struck with what is believed to be an explosive device. There are no reports of any injuries."
Northern Ireland Secretary Theresa Villiers condemned last night's attack.
She said: "Those who carried out this attack on police officers working to protect all communities are to be utterly condemned for their violent actions.
"I would call on anyone with information to pass it to the PSNI so that those responsible can be brought to justice."