A 33-year-old Indian-origin police officer in the US state of California has been killed after being shot by an "armed" unidentified gunman while he was conducting a traffic stop.

US President Donald Trump and First Lady Melania on Wednesday night made a surprise visit to Iraq to greet American soldiers stationed in the country.

Three Indian teenaged siblings were among four people killed in a fire at a house in the US state of Tennessee, just two days before Christmas, according to media reports.

 Indonesian authorities asked people to avoid the coast in areas where a tsunami killed more than 420 people last weekend in a fresh warning issued on the anniversary of the catastrophic 2004 Asian earthquake and tsunami.

Panicked residents, police and soldiers in this remote fishing village clobbered by a devastating weekend tsunami ran to higher ground Tuesday, shouting "Water is coming! Water is coming!" and reciting verses from the Quran as emergency messages were broadcast over mosque speakers.