The assassination of Hamas political leader Ismail Haniyeh on Wednesday has thrown further uncertainty over ceasefire negotiations between Hamas and Israel, with Haniyeh having long played a key role in Hamas’s civilian diplomacy. Israel’s top ally, the United States, has responded by denying prior knowledge or involvement in the attack likely carried out by Tel Aviv. “This is something we were not aware of or involved in. It’s very hard to speculate,” US Secretary of State Antony Blinken told Channel News Asia (CNA) in Singapore. Blinken added that the US would “continue to labour” for a ceas…