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A new wave of terrorist attacks has been unleashed on a busy shopping street in the Philippines, where a group of teenagers are believed to have used a car-mounted camera to spy on shoppers.

The camera was used in a carjacking and attempted carjacker in the southern city of Marawi, police said.

The latest attack was reported by local media early Saturday morning.

Police are searching for the teens, who they said have a “black belt” in martial arts.

It is unclear whether they are connected to previous attacks in the region.

The Philippines is the most populous country in Southeast Asia, and has a large Muslim population.

A video that went viral after it was uploaded on Facebook shows a masked man wearing a mask and wielding a weapon at a traffic stop in a city known for its rich heritage of ethnic and religious diversity.

The video has since been removed from the social media platform.

Authorities said in a statement that the attack took place about 12:45 p.m. local time Saturday in Marawi City, which is home to about 200,000 people.

Police later confirmed that two people died and three others were wounded.

Police were searching for two other suspects who are in the vicinity, but they have not yet been located.

The carjacked driver fled the scene, police told CNN Philippines.

In an online posting, the Islamic State of Iraq and Syria (ISIS) group said it had carried out the attack.

“Today’s attacks are the result of the US-led coalition’s actions in the Middle East against Islamic State, which threatens the very existence of the Islamic Republic of Iran and the whole world,” the group said.

“They will continue to pay a heavy price for the crimes committed against their people and for the violation of their sovereignty.”

CNN Philippines’ Jessica Dias contributed to this report.