Concern over media reports that the US military carried out a second strike killing survivors on a suspected drug boat prompts a bipartisan inquiry.

The president's refusal comes as Democrats, other critics say strikes killing at least 83 people are unjustified and illegal 'extrajudicial killings.'

WASHINGTON: The US military conducted a follow-up strike on a boat in the Caribbean that it believed to be ferrying drugs, killing survivors of an initial missile attack, US media…