ZAMBOANGA CITY, Philippines - An explosion rocked Barangay Guiwan, Zamboanga City on Friday afternoon, leaving at least 2 people dead and 52 others injured, authorities said.Initial reports said the explosion hit a Kia car parked in front of a videoke bar near a bus terminal.One of those who died in the blast has been identified as Reynaldo Tan. a policeman was reportedly among those injured in the blast. the victims have been brought to different hospitals in the city.Police and members of the bomb squad are in the area to investigate the incident.Authorities said Zamboanga City has been receiving threats from lawless elements following the intensified operations of the military against the Abu Sayyaf Group.The city was recently placed under red alert after a foiled jailbreak at the city jail involving the group of Abu Sayyaf leader Furuji Indama. Speaking to ANC's "Top Story," Mayor Beng Climaco said the Abu Sayyaf Group could be behind the explosion.Climaco said the blast could be part of a plot by the terrorist group to break 57 of their "high-value" comrades out of the city jail. "We have received notices (from the intelligence community) that theyare going to be rescued by their comrades, who are ready to die," she said.