Israel accuses Hamas of violating the ceasefire as the group's civil defence agency says nine people have been killed in the strikes.

At least 26 people were killed on Tuesday after Israeli strikes in Gaza, health officials said, including strikes in Khan Younis and Gaza City.

Israeli Prime Minister Benjamin Netanyahu on Tuesday instructed the Israeli military to "carry out powerful strikes in Gaza," a statement from his office said.

Israel alleged Hamas launched an attack against troops in Israeli-controlled territory in Gaza.

U.S. President Donald Trump said on Wednesday that a U.S.-backed ceasefire in Gaza was not at risk after local authorities reported that 26 people had been killed in Israeli strikes, as Israel and Hamas traded accusations of blame for the violence.

Hamas denies it was behind an attack on Israeli forces inside an area of Gaza under their control and condemns the strikes.

Israel launched retaliatory strikes inside Gaza after accusing Hamas of violating President Trump’s ceasefire deal. Israel said that Hamas fired on its troops earlier in the day. NBC News’ Matt Bradley reports.

Israeli Prime Minister Netanyahu has instructed the IDF to "carry out powerful strikes in Gaza," the prime minister's office said.

President Donald Trump gave Hamas a 48-hour ultimatum to return bodies of 13 deceased hostages or face consequences from countries involved in the Gaza peace deal.

An official from the Israel Defense Forces told NBC News that Israeli Prime Minister Benjamin Netanyahu called for strikes in retaliation for a Hamas attack in Rafah.