The Latest on the explosion that rocked the Turkish city of Bursa (all times local):

6:20 p.m.

Turkish officials say a suicide attack has hit the northwestern city of Bursa, a popular tourist destination.

A security official told The Associated Press the attack Wednesday was carried out by suicide bomber. The official spoke on condition of anonymity because he wasn't authorized to speak to the press.

The office of the governor of Bursa said in a statement carried by the state-owned Anadolu Agency that a woman believed to be a suicide bomber blew herself up.

The statement said seven people were wounded in the attack.

The explosion ripped through an area that is home to an Ottoman-era mosque and bazaar.

___

6:20 p.m.

Turkish media reports say an explosion has rocked a major city in northwestern Turkey.

The private Dogan News agency says the explosion hit near the Grand Mosque of Bursa and broadcast footage shows people fleeing the area.

NTV television says three people were wounded by the blast. The state-run Anadolu Agency says ambulances and fire brigades have been deployed to the scene.

There was no immediate word on the cause of the explosion.

Turkey has recently been hit by several attacks by the Islamic State group and Kurdish rebels but also on occasion witnesses explosions related to natural gas malfunctions.

The United States on Tuesday issued a new warning to its citizens about "credible indications" of terrorist threats at tourist areas in Turkey.