Policemen shift an injured colleague after a bomb blast in Karachi on January 24, 2013. – AFP Photo

KARACHI: Two consecutive explosions ripped through Karachi’s densely populated Quaidabad area on Thursday, killing four people including two police officials and injuring a dozen others, DawnNews reported.

According to reports, the first blast happened in a garbage dump. However, nobody was reported hurt in the explosion.

Police and rescue officials reached the location soon, following which the second explosion took place.

Senior police officer Alilm Jaffery told AP the victims responded to a report of the explosion and then were killed by the second blast after they reached the site.

According to SP Sindh Police Umar Khattab, Deputy Superintendent of Police (DSP) Kamal Khan Mangan and Sub-Inspector Akbar were among four people killed.

Private security guard Saeedur Rehman and a passerby, identified as Fazal, were the other two victims of the blast.

Police further said that two of their vehicles and two ambulances were damaged in the explosion.

This is a developing story and will be updated as reports come in.