MANILA, Philippines -- The Philippine National Police has issued an "all-points bulletin" mobilizing all police territorial and operational units on land, sea and air to stop American Jason Ivler, suspect in the killing of the son of a Malacañang executive on Wednesday, from escaping abroad.

PNP Director Gen. Jesus Verzosa gave out the bulletin, which contained information about Ivler, in coordination with the Bureau of Immigration, to ensure the arrest of Ivler, said Chief Supt. Leonardo Espina, the PNP spokesperson, in a phone interview with the Philippine Daily Inquirer on Sunday.

Espina also disclosed that several raids were being conducted by the police in all possible hideouts and places Ivler frequented in the capital.

But he declined to specify these locations, saying that the undertaking was an "operational matter" that cannot be revealed yet to avoid preempting efforts to arrest the suspect.

"We have alerted all our units," Espina said.

The 27-year-old Ivler, was believed to have shot dead at close range Renato Victor Ebarle Jr., son of Malacañang chief of staff Renato Ebarle Sr. during a traffic altercation in Quezon City last Wednesday.

According to witnesses, the shooting occurred after the cars they were driving nearly collided on Santolan Road. Ivler allegedly got out of his car, a Honda CRV, and shot the victim at close range.

The police established that Stephen Pollard, an executive at the Asian Development Bank, owned the car bearing a diplomatic plate. Pollard later told police that he was not using the car at the time of the shooting. Based on the witnesses’ description of the shooter, all the pieces of information eventually led police to Ivler, Pollard’s stepson.

Espina said that aside from the National Capital Region Police Office, the Quezon City Police District and the PNP Aviation Group, the police highway patrol group have also been tapped to join the manhunt operations against Ivler.

The police believed that Ivler was still in Metro Manila. "There is no record or information showing that he left the capital," said Espina. "We are still trying to find out [his whereabouts]... and we will leave no stone unturned until he is arrested," he added.