An explosion near Chenak Chowk in Balochistan?s Sibi district on Thursday killed one person and injured five others, according to a police official.

Station House Officer (SHO) Ghulam Ali Abro, posted in Sibi, told Dawn that the incident was a grenade attack which occurred at 7:05pm.

?One person expired and five others were injured,? the SHO said. ?Security forces and Edhi ambulances arrived on the scene as soon as they received reports about the incident.?

He further told reporters at the site of the attack that six injured people were transported to a hospital, with one of them succumbing to their injuries on the way.

Meanwhile, Sibi region Deputy Inspector General of Police (DIG) Barkat Khosa told Dawn that the injured were moved to Teaching Hospital, while the body of the deceased was handed over to his heirs.

?Police have tightened security in the area and further investiagation is under way,? DIG Khosa said.

Last November, security forces killed at least three terrorists in retaliatory action a suicide bomber blew himself up at the main gate of the Frontier Corps (FC) headquarters in Balochistan?s Nokkundi, according to a statement issued by the spokesperson for FC Balochistan South.

It said one of the ?suicide attackers? blew himself up at the headquarters? main gate, following which quick response force personnel retaliated and killed three terrorists.