SYDNEY (Reuters) - Australia signed an agreement on Saturday with Southeast Asian nations including Indonesia, Malaysia, Brunei and the Philippines promising to share intelligence to combat terrorism.

Australia's Prime Minister Malcolm Turnbull gestures to ASEAN leaders Laos' Prime Minister Thongloun Sisoulith, Indonesia's President Joko Widodo, Cambodia's Prime Minister Hun Sen, Brunei's Sultan and Prime Minister Sultan Bokliah, Thailand's Prime Minister Prayut Chan-O-Cha, Singapore's Prime Minister Lee Hsien Loong, Vietnam's Prime Minister Nguyen Xuan Phuc, Philippines' Secretary of Foreign Affairs Alan Peter Cayetano, Myanmar's State Counsellor Aung San Suu Kyi and Malaysia's Prime Minister Najib Razak to leave the stage after posing for the Leaders Welcome and Family Photo at the one-off summit of 10-member Association of Southeast Asian Nations (ASEAN) in Sydney, Australia, March 17, 2018. REUTERS/David Gray

Prime Minister Malcolm Turnbull announced the signing of the memorandum of understanding in which Association of Southeast Asian Nations (ASEAN) agreed to share intelligence, co-operate on lawmaking and counter extremism on social media.

Australia is hosting ASEAN meetings this weekend, despite not being a member of the 10-nation bloc, as it seeks to tighten political and trade ties in the region amid China’s rising influence.

Turnbull said in a televised address to ASEAN that Islamic State’s influence was growing in Southeast Asia after the militants had lost their caliphate in the Middle East.

“They’ll return battle-hardened and trained, so it’s vital for Australia and our ASEAN partners to collaborate across borders,” he said.

Turnbull said non-conventional tools such as digital currencies, stored value cards and crowd-funding platforms were making it harder to detect terror financing.

“As regional partners, we all play a crucial role in combating these disturbing and dangerous phenomena,” he said.

Australian Home Affairs Minister Peter Dutton said the government would introduce a new law to crack encryption online.

The new law would force companies providing communications services and devices in Australia to help agencies in investigations, he said in a press release.

Malaysian President Najib Razak said Islamic State’s online propaganda could reach more than 300 million Muslims in Southeast Asia.

“What is also very important is promoting a culture in which radical ideologies find it hard to take root,” he said.