World News Update, what you need to know

Police say they have found 139 grave sites and 28 abandoned detention camps used by people-smugglers in remote northern Malaysia.

ELSEWHERE

WASHINGTON - Rescuers are searching for at least 12 people missing in spectacular flash flooding in Texas and Oklahoma that has also left at least three dead.

MEXICO CITY - A tornado has ripped through the northern Mexican border city of Ciudad Acuna, killing at least 10 people, destroying homes and upending cars.

BAGHDAD - Iraq has rejected US accusations its security forces dodged battle in Ramadi and lack the will to fight the Islamic State group.

KANDAHAR, Afghanistan - Taliban gunmen have surrounded a police compound in the volatile southern province of Helmand after killing 19 policemen and seven soldiers.

BEIRUT - Syrian government aircraft have launched at least 15 strikes in and around the ancient city of Palmyra following its fall to the Islamic State group.

KANO, Nigeria - Boko Haram fighters have hacked to death 10 people in a remote village in northeastern Nigeria.

ATHENS - Struggling Greece will keep repaying its EU-IMF creditors for as long as it can, with some 300 million euros ($A421.88 million) due next week and no deal in talks over the country's remaining bailout funds.

SOFIA - Bulgaria, Greece and Turkey have agreed to set up a common border police and customs centre to exchange information to combat a surge in illegal migration.