News brief: Big stories of the day

The Islamic State-linked Sri Lankan extremist group National Thowheed Jamaath (NTJ), blamed for the Easter Sunday bombings, has been found possessing more than Rs 9,70 crore in cash and other assets worth over Rs 7,00 crores, police said on Monday.

A plane crash in a remote mountain region in northern Mexico claimed the lives of all 13 people on board, including a family of five that were flying back from watching a boxing match in Las Vegas, authorities and local media said on Monday.

The US on Monday said it planned to beef up its Arctic presence to keep Russia's and China's "aggressive behaviour" in check in the resource-rich region. "The region has become an arena of global power and competition" owing to vast reserves of oil, gas, minerals and fish stocks, US Secretary of State Mike Pompeo warned in a speech in Rovaniemi, northern Finland.

China backtracked on substantial commitments it made during trade talks with the United States, prompting President Donald Trump to impose additional tariffs on Chinese goods slated to go into effect on Friday, top US trade officials said on Monday.

Turkey's top election body ordered a re-run of Istanbul's mayoral election on Monday after the party of President Recep Tayyip Erdogan complained about its shock defeat in the vote, the state news agency reported.