A man resembling Bondi gunman Naveed Akram has been captured on CCTV in Davao City in mid-November, as authorities continue to investigate the movements of him and his father, Sajid Akram, in the lead-up to the attack.

Photos have emerged of the passports reportedly used by the alleged Bondi terrorists during a month-long trip to a known terror hotspot in the Philippines weeks before Sunday’s mass shooting.

Sajid and Naveed Akram returned to Sydney from Davao just around two weeks before the deadly mass shooting at Bondi Beach on December 14.

Father-son gunmen Sajid and Naveed Akram travelled to the Philippines to receive "military-style training" in the month before they killed 15 people at a Hanukkah celebration at Bondi Beach, security sources have confirmed.

Spending by Bondi shooters Sajid Akram and Naveed Akram in a Philippines terror hotspot should have been flagged by Australia’ financial monitoring system, industry sources say, with experts questioning how the men avoided raising the suspicion of intelligence agencies despite weeks on the ground.

Australia is grieving as two gunmen, Sajid Akram and his son, Naveed Akram, opened fire during a Hanukkah celebration at Sydney’s Bondi Beach on Sunday (December 14), killing 15 people and injuring several others.

Before Sajid Akram was granted a gun licence, the domestic intelligence agency ASIO had warned NSW Police that his son, Naveed Akram, had been associating with Islamic extremists.

Sajid Akram and his son Naveed spent nearly the entire month of November in the Philippines, with the older man entering as an "Indian national", authorities in Manila said.

Pictures show a tiny hotel room with two single beds that cost just over $20 a night and was reportedly paid for in cash.

The alleged gunman lost his job several months ago. His family said he pretended he was on a fishing trip for the weekend.