Washington, Aug. 14 -- US President Donald Trump's envoy and son-in-law Jared Kushner is planning to travel to Jerusalem and Cairo next week as efforts continue to advance the Trump administration's Gaza peace plan, despite Israeli Prime Minister Benjamin Netanyahu's complete rejection of the Board of Peace's proposed roadmap.

Former UK Prime Minister Tony Blair and Board of Peace Director-General Nickolay Mladenov will accompany Kushner, according to an official with the Trump-backed body.

The three are expected to continue what the official described as "constructive" discussions on how to implement Trump's 20-point Gaza peace plan, which calls for Hamas to disarm and give up its role in governing Gaza while Israeli forces withdraw from...