Johnson condemned the attack on the Aramco facilities, and confirmed his country's support for Saudi Arabia, and Britain's concern for the security of the Kingdom, according to the Saudi Press Agency "SPA".
"The subversive attack is a dangerous escalation not only towards Saudi Arabia but the whole world," the Saudi crown prince commented.
Johnson said the two leaders also agreed on the need to reduce the escalation in the region, and expressed their commitment to a common approach to Iran, which US President Donald Trump blames for the attack, according to the agency "Reuters".
The Saudi Defense Ministry said on Wednesday it would hold a press conference for the official spokesman to reveal evidence of Iran's involvement in attacks on Aramco's oil facilities.
"Evidence of the Iranian regime's involvement in the attack on Aramco's laboratories will be presented during the conference," Saudi state television said in a statement.
"The Iranian weapons used in the attack will be displayed on Aramco's factories," he said.
Ansar Allah (Houthis) claimed responsibility on Saturday for a drone attack on two oil facilities belonging to Saudi oil giant Aramco in Abqaiq and Hijrat Khurais in Saudi Arabia's eastern region.