By IANS,
Karachi : At least three people were killed and over 20 injured in a massive bomb explosion that targeted a Pakistan Navy bus in this port city Thursday, just two days after twin blasts blew up two naval buses and left four dead.
The deafening blast took place at about 8.15 a.m. in the Karsaz area of the city when the naval bus was carrying an estimated 35 people to office, Xinhua quoted Duniya TV as saying.
The three people killed in the attack include two lieutenants and a 19-year-old pedestrian.
Three of the over 20 injured people were in a critical condition.
There were differing accounts on how the blast was carried out Thursday.
Police sources were quoted as saying that the bomb containing an estimated three kg of explosives was placed on a motorcycle and a remote control device was used to trigger the blast when the bus passed the area.
Geo TV, however, reported that the bomb was placed in a gutter near a petrol pump and went off when the bus crossed Karsaz Bridge on Shahrah-e-Faisal.
Eyewitnesses said the blast threw the bus four to five feet into the air.
Rescue team rushed the injured to a nearby military hospital in the city.
Thursday morning blast is the third of its kind in the city over the past three days.
On Tuesday morning, two navy buses carrying officials to work were blown up in two different locations in the city, leaving four people, including a military lady doctor dead and 56 injured.