A response from Hamas on Israel's ceasefire proposal that US President Joe Biden revealed on Friday is still being awaited, White House national security adviser Jake Sullivan told reporters on Tuesday.
"We are waiting for a response from Hamas" through the Qatari mediators, Sullivan said.
CIA Director Bill Burns will be in Doha to consult with Qatari mediators on the Gaza ceasefire proposal, Sullivan added. Qatar has been mediating on Gaza between Israel and Hamas.
Qatar said on Tuesday it had delivered the Israeli ceasefire proposal to Hamas that reflected a three-phase proposal presented by Biden, and that the paper was now much closer to the positions of both sides.
A spokesman for Hamas, which has ruled Gaza since 2007, reiterated on Tuesday it could not agree to any deal unless Israel makes a "clear" commitment to a permanent truce and complete withdrawal from Gaza.
For his part, Israeli Prime Minister Benjamin Netanyahu has also repeated that there can be no permanent peace unless Hamas is eradicated, as he struggles with profound political divisions at home over the US-backed truce proposal.
Israel's assault on Gaza has killed more than 36,000, according to the local health ministry, caused widespread hunger, flattened most of the enclave and led to genocide allegations that Israel denies.

US envoys arrive in Qatar as mediators work to revive Iran talks
Afghanistan launches airstrikes on IS targets on border with Pakistan
Bangladesh warns of dengue surge as weather aids spread
Fourteen children killed in Pakistan after tutoring centre roof collapses
Supreme Court rejects Trump bid to restrict birthright citizenship
South Africa's anti-migrant protesters march nationwide
Iran and US agree to halt attacks, uncertainty over Doha talks
Manhunt launched after Monaco blast targets Ukrainian-born oligarch
