"Iran should face up to the consequences of what they've done. This was clearly an unacceptable and outrageous attack on commercial shipping," the British Prime Minister told reporters, according to the Reuters news agency.
"A UK national died. It is absolutely vital that Iran and every other country, respects the freedoms of navigation around the world and the UK will continue to insist on that," he added.
On Sunday, Britain condemned Iran and accused it of carrying out Friday’s deadly attack, saying it has concluded that Iran is likely to blame for the drone bombing.
“UK assessments have concluded that it is highly likely that Iran attacked the MV MERCER STREET in international waters off Oman using one or more Unmanned Aerial Vehicles,” the UK said.
Israel accused the Iranian government of carrying out the attack, and Prime Minister Naftali Bennett hinted at a possible Israeli response.
“We know how to convey the message to Iran in our own way," he said.
A spokesman for Iran's Foreign Ministry on Monday vehemently denied claims that his country was behind the attack.
The spokesman called the accusations "baseless and provocative," and warned that Iran would respond to any retaliatory action against it, "immediately and determinedly".
