MANILA, Philippines?The police on Sunday said there remained no conclusive evidence that the blasts that rocked three banks in the cities of Valenzuela and Caloocan last week were connected to each other or to similar previous incidents in Metro Manila.

Chief Superintendent Samuel Pagdilao Jr., director of the Northern Police District, said his office is still waiting for the findings of the Philippine National Police crime laboratory unit, which was examining debris found at the scene of the explosions.

?At this point, it?s still premature to say the twin blasts at Allied Bank are connected to the blast in Union Bank,? he told the Philippine Daily Inquirer.

Pagdilao said the crime laboratory would likely be able to release its report tomorrow during a case conference.

He added that the police were still hunting down the men who hurled an explosive at the Union Bank based on a composite sketch drawn up from the descriptions of eyewitnesses. There have been no leads so far in the Allied Bank blasts.

On the night of July 11, blasts rocked the branches of Allied Bank on MacArthur Highway in Marulas, Valenzuela, and Rizal Avenue in Caloocan. The following day, another explosion hit the Union Bank branch on MacArthur Highway in Marulas, the police said.

But Pagdilao said although the Union Bank branch was near the Allied Bank branch in Valenzuela, it was still too early to tell if the bombing incidents were done by the same group.

He earlier said it was likely the blasts came from pillboxes, considering that no components of improvised explosive devices were found at the scene.

In all three cases, the blasts caused no injuries and only minor damage to the establishments.

Pagdilao said he is also coordinating with the Quezon City police to determine possible links to the explosives found at the Department of Agriculture and the Office of the Ombudsman in June.