India, May 22 -- India is expected to ask US authorities to boost security for its diplomats and embassy in Washington DC in the wake of the killing of two Israeli embassy staffers in the US capital, people familiar with the matter said on Thursday.

The matter has gained urgency as an all-party delegation led by Congress MP Shashi Tharoor is set to visit Washington in the first week of June, and Khalistani separatists have levelled threats against the team, the people said.

"The security of our diplomats is a sensitive matter. We are having a close look at the issue after what happened to the two Israeli embassy officials," one of the people said.

The all-party delegation is going to the US as part of New Delhi's global outreach to hig...