TEHRAN ?-- Two explosions hit southeastern Iranian city of Zahedan on Thursday, leaving "several dead and injured," the official IRNA news agency reported.

The first explosion occurred at 9:20 pm local time (1650 GMT) in front of the city's Grand Mosque, followed by a second blast within minutes, IRNA reported.

"It is not yet possible to determine the exact number of those killed and injured in the incident," a police official in Sistan- Baluchestan province was quoted by the IRNA as saying.

Emergency forces have arrived at the scene of the incident, Jalal Sayyah said, adding that investigation is underway to determine the cause of the explosions.