At least four people were injured in two small intensity blasts that took place around a railway track in south Pakistan's city of Hyderabad on Monday, police sources said.

The blasts twisted almost two feet of railway lines near Qasimabad residential area between Kotri and Hyderabad, local police said.

Heavy contingent of police along with bomb disposal squad have reached the site. The tracks are being repaired by the railways staff, said an official of Pakistan Railways.

No group has also claimed the responsibility for the saboteur as well.

No loss of life was reported in the incident but it did disrupted railway traffic for several hours.

Police had defused two bombs planted near the railway track in Hyderabad district in June this year.

During the same month, five bomb explosion attempts targeted railway track in Sindh. Four bomb blasts had significantly damaged railway track in district Ghotki near Sukkur in Sindh province. While one of the two planted bombs exploded partially damaging a railway track in Bin Qasim area of southern port city of Karachi.