Oil is a fuel that ships carry all around the world. Its price is quoted per barrel. On Friday, Brent crude, a main world price, rose to about $114.50 a barrel. Later in the day it reached $117.20.
The price rose after more attacks on Saudi Arabia. The Houthis, a group in Yemen, said they hit the defence ministry in Riyadh, two airports and an oil site in Yanbu. These are the Houthis' own claims. Two people died in attacks at Dammam airport.
Saudi Aramco, the kingdom's oil company, then moved people out of its headquarters in Dhahran. It was the first time it had done that since the war with Iran began. Oil was on track to rise for a third week in a row. Many countries buy oil from the Gulf, so changes there matter far away.