Crude oil futures slipped on Monday as investors cashed in some profits from last week’s rally but concerns about Saudi-Iran tensions kept losses in check.

Brent crude futures LCOc1 were down 35 cents at $70.10 a barrel by 1:05 p.m. EDT. U.S. West Texas Intermediate (WTI) crude futures CLc1 lost 47 cents to $65.41.

Last week, Brent gained 6.4 percent and WTI rose 5.7 percent, the strongest weekly gains since July.

“I don’t see anything extraordinarily bearish in the market today. I think some folks here are just ... happy to take profits,” said Bob Yawger, director of energy futures at Mizuho in New York.