DIG Operations Dr Haider Ashraf confirmed that the explosion happened in a fruit laden truck which was parked at a parking lot on Out Fall Road in Islampura area. He said that explosives were hidden in the truck which accidentally triggered around 9pm, causing damage to scores of vehicles parked in the area.
The injured were rushed to nearby Mayo Hospital, Services Hospital and Mian Munshi Hospital where an emergency has been imposed. At least four injured are said to be in critical condition in Mayo Hospital.
Due to a power breakdown following the blast, hospital authorities are facing problems in carrying out emergency operations.
Police and other law enforcement personnel (LEAs), including forensic experts, reached the blast site soon after the incident and cordoned it off.
The authorities have launched an investigation to determine how and when the truck arrived in the area.
The roof of a nearby house had collapsed due to the intensity of the explosion, while the windowpanes of nearby buildings had shattered from the shock waves. A number of automobiles were also damaged in the incident.
Rai Ijaz, a senior police officer at the site, told reporters that the explosion created a big crater.
String of bombing incidents
There have been several high-profile terrorism incidents in Punjab's capital city this year.
Last month, 26 people, including nine policemen, were killed and 58 others were injured in a bombing attack near the Arfa Karim IT Tower on Lahore's Ferozepur Road.
Another blast, targeting a census team in April, had resulted in the deaths of six people, including five forces personnel.
Similarly, a suicide blast on February 13 had ripped through a camp of protesting chemists in front of the Punjab Assembly, leaving 13 people dead and 70 others wounded.