Police say an explosion wounded five women and slightly damaged a karaoke bar in a southern Philippine city amid fresh concerns about possible terrorist attacks in the country.
Police Superintendent Gilberto Tuzon says investigators are determining whether the blast late Saturday in Tacurong city in Sultan Kudarat province arose from a local feud or was an act of terrorism.
Tuzon said Sunday that the victims included customers and waitresses.
Military officials reported that an 81 mm mortar was used in the blast but Tuzon says the damage was not extensive enough for such an explosive.
The U.S. State Department renewed its travel warning for the Philippines on Tuesday, saying terrorist attacks could occur in the restive south or in the capital, Manila.