The father and son duo suspected of carrying out a massacre at Sydney’s famed Bondi Beach on Sunday were “driven by Islamic state ideology,” police say, and they recently traveled to a part of the Philippines – which has previously been a hotbed of Islamic extremism.

If you witnessed the Bondi Hanukkah attack, here’s what you might be going through – and when you might need additional support. People who witnessed the attacks may be affected in different ways. Factors that make people more vulnerable to traumatic responses, such as extreme distress or mental health challenges, include:

Sajid Akram, originally from Hyderabad, India, was a suspect in a mass shooting at Bondi Beach, Australia. He migrated to Australia in 1998 and was radicalized with his son, Naveed. The investigation examines their ties to jihadist networks and their travel to the Philippines for military training.

Sajid Akram was shot dead at the scene, while Naveed was arrested and remains under police guard in hospital with serious injuries.

The government is prepared to take whatever action is necessary. Included in that is the need for tougher gun laws,” Prime Minister Anthony Albanese said.

Australia's gun laws, considered among the toughest in the world, are now being examined by the federal government, after it was revealed that Sajid Akram had six registered weapons. Police said he had held a gun licence since 2015.