British Prime Minister Boris Johnson and US President Donald Trump condemned last weekend’s attack on Saudi Arabian oil facilities and discussed the need for a united diplomatic response in a telephone call on Wednesday, Johnson’s office said. “They condemned the attacks and discussed the need for a united diplomatic response from international partners,” a statement said. “They also spoke about Iran and agreed that they must not be allowed to obtain a nuclear weapon.” A White House spokesman said in a statement the two leaders “reaffirmed the value of the special relationship in addressing shared security concerns, most notably Iran’s destabilizing behavior”. The US accused Iran of launching the attacks against Aramco’s Abqaiq and Khurais oil facilities. Saudi Arabia on Wednesday presented evidence of Iranian drones and missiles that were used in the attacks. Tensions in the Gulf have risen since Trump unilaterally withdrew the US from Tehrans 2015 nuclear deal with world powers. Britain and other European countries are still abiding by the agreement. Iran has responded to the withdrawal by reducing its commitments to the accord.