Authorities in the Philippines gave an update on their investigation of the accused Bondi Beach gunmen's movements during their weeks-long trip to the country.

The father-son duo – who are now accused of carrying out a deadly attack at a Hanukkah event at Bondi Beach in Sydney, Australia, this week — allegedly previously traveled to Davao City for their four-week visit to the Philippines, according to reports. This comes after a recent confirmation by Philippine authorities that the father and son spent nearly the entire month of November in the country.

Philippine police and hotel staff said the father and son rarely left their hotel room except for an hour or so at a time, training from Islamist groups believed to be operating in the country, but authorities have pushed back against the assertion.

On Tuesday, the Philippines Bureau of Investigation said the two accused gunmen travelled to the Philippines on Nov. 1 aboard Philippine Airlines Flight PR212 from Sydney to Manila before making their way to Davao, Islamic State-inspired militants stormed Marawi, the capital of Lanao del Sur province in the Muslim-majority Bangsamoro Autonomous Region in Mindanao. Reuters reported that the siege of Marawi displaced approximately 350,000 residents and left more than 1,100 dead, most of whom were militants.

The city is currently under a "Level 4: Do Not Travel" advisory, with the State Department warning that "civilians face risk of death or injury from ongoing clashes between terrorist group remnants and Philippine security forces in Marawi."

Islamic State-aligned groups has declined in recent years, the Philippines military has had infrequent clashes with remnants of the groups.

The Bondi Beach attack unfolded on Sunday as gunmen opened fire at a Hanukkah celebration, killing at least 15 and leaving dozens injured. The older gunman, who was the younger gunman's father, died at the scene.

On Wednesday, New South Wales Police announced the 59 charges against the 24-year-old surviving suspected gunman, including "commit terrorist act," 15 counts of murder, 40 counts of "cause wounding/grievous bodily harm to person with intent to murder," "discharge firearm etc intend cause grievous bodily harm," "cause public display of prohibited terrorist org symbol" and "place explosive in/near building with intent to cause harm."

NSW Police said that the alleged gunman is still hospitalized and is under police guard.