Three US service members were killed and at least 34 injured in a drone strike carried out by radical Iran-backed militant groups on a US base in northeast Jordan, US officials said. It is the first time that a strike has killed US troops in the region since Hamas's October 7 attack on Israel. President Biden has vowed to hold those responsible for the attack to account for it. A US official said that the attack took place overnight at Tower 22, a small outpost near the Syrian border. The drone struck living quarters for the troops, contributing to the high casualties.<br />''<br />''Jordan says the attack took place in Syria, not inside Jordan. It is not clear who is behind this latest attack. A Jordanian government spokesman, Muhannad Moubaideen said that the attack targeted the al-Tanf base in Syria.  <br />''<br />''Iran's mission to the United Nations said that Tehran was not involved in the attack that killed three US service members in northeastern Jordan near the Syrian border. In a statement, the mission said that Iran has no connection and has nothing to do with the attack on the US base. Iran said, there is a conflict between US forces and resistance groups in the region, which reciprocate retaliatory attacks.<br />''<br />''Last month, the US carried out air strikes against Iran-affiliated groups after three US service members were injured, one critically, in a drone attack on a base in northern Iraq. US and coalition troops are also stationed in the Red Sea after the Iran-backed Houthis began attacking commercial ships in the region. <br />