At least seven people were killed, several others injured and several buildings collapsed as 7.9 magnitude earthquake hit parts of Pakistan on Tuesday afternoon, local media reported.

Local Urdu TV channel Dunya News said that seven people were killed and several others injured when several houses collapsed in Mash Khel area of Panjgur, a district located at some 517 km southwest of Quetta of the country's southwest Balochistan province.

The injured people were sent to hospitals where some of them were said to be in critical condition.

Meanwhile in the country's southern port city of Karachi, two buildings were partially destroyed due to strong tremors, injuring at least five people.

Elsewhere in Dera Ghazi Khan district of eastern Punjab province, three people were injured and five cattle died in land sliding triggered by the earthquake in the mountainous area.

Arif Mahmood, Director General of Pakistan Meteorological Office, said that the earthquake tremors were felt at about 3:44 p. m. (local time) mainly in the country's Sindh, Balochistan and Punjab provinces.

He said the tremors were felt for about 20 to 25 seconds in the country, adding that the earthquake is likely to be followed by after-shocks.

The earthquake's epicenter was located on Pakistan-Iran border at the depth of 76 km.

Flight operations were suspended at Karachi airport and people were evacuated from its premises.