New Delhi, Dec. 30 -- An investigation that extended to the Philippines of two men accused of shooting dead 15 people at a Sydney Jewish festival has found no evidence that they were part of a "broader terrorist cell," police said on Tuesday.

Sydney residents Sajid Akram, 50, and his 24-year-old son Naveed Akram spent most of November in Davao City in the southern Philippines, Australian Federal Police Commissioner Krissy Barrett said.

They returned on a flight from Manila on Nov. 29. Two weeks later, they are accused of killing 15 and wounding another 40 in a mass shooting that targeted a Hannukah festival at Bondi Beach.

Philippine National Police determined the pair rarely left their hotel during the visit, Barrett said.

"There is ...