Iran has threatened a harsh response to expanded US sanctions, viewing any cooperation with Washington as an "act of war". The new sanctions come after weeks of impasse, with the US failing to dislodge Iran's grip on the Strait of Hormuz. Meanwhile, Iran is holding separate talks with Oman on jointly managing the waterway, regardless of a potential new deal with the US. Israel, on the other hand, announced that it killed a Hamas commander in Gaza, escalating tensions further. In a separate incident, Israeli Prime Minister Benjamin Netanyahu accused Iran of attempting to assassinate one of his sons, without providing details. Syrian and Israeli officials met over the weekend in Jordan to defuse tensions after an Israeli strike on a Syrian airbase last week. The US-mediated discussions focused on restarting negotiations for a future security agreement. Elsewhere in the Middle East, at least four people were killed in Israeli strikes in the Gaza Strip, including two children. The Israeli military claimed it struck Hamas weapons storage facilities, but provided no evidence. China has expressed concerns over escalating tensions and the potential imposition of secondary sanctions on countries trading with Iran, stating that such measures will only exacerbate tensions and disrupt global economic development.