Tel Aviv, April 29 -- A senior Qatari official has urged both Israel and Hamas to show "more commitment and more seriousness" in cease-fire negotiations in interviews with Israeli media, as pressure builds on both sides to move toward a deal that would set Israeli hostages free and bring potential respite in the nearly 7-month-long war in Gaza.

The interviews with liberal daily Haaretz and Israeli public broadcaster Kan were published and aired Saturday evening.

They came as Israel still promises to invade Gaza's southernmost city of Rafah despite global concern for hundreds of thousands of Palestinians sheltering there, and as the sides are exchanging proposals surrounding a cease-fire deal.

Qatar, which hosts Hamas headquarters in Doha...