LONDON, Jan 23 Reuters Oil prices fell on Tuesday, handing back some of the previous day39;s gains, as traders weighed rising crude supply in Libya and Norway against simmering geopolitical tensions in several regions and production outages in the United States.

Brent crude futures were down 59 cents, or 0.74, to 79.47 a barrel at 1240 GMT, after trading 1 lower their intraday nadir.

U.S. West Texas Intermediate crude futures WTI were down 54 cents, or 0.72, to 74.22 a barrel.

Brent slipped back below 80 a barrel after settling above the threshold on Monday for the first time since Dec. 26.

Oil futures remain volatile as uncertainty persists around several supply and demand indicators.

Traders weigh up economic prospects, interest rates, OPEC and the risk of supply disruptions as a result of events in the Red Sea. Were no clearer on any of these than we were a few weeks ago, said OANDA analyst Craig Erlam.

Crude prices rose by around 2 on Monday after a Ukrainian drone strike on Novatek39;s UstLuga Baltic fuel export terminal near Russia39;s second city St Petersburg raised supply concerns.

The drone attack was a timely reminder that a bigger, more influential war is still raging on, said PVM analyst John Evans.

Tensions also rose in the Middle East, where U.S. and British forces carried out a second joint round of strikes on Houthi positions in Yemen on Monday night.

Norway39;s crude production rose to 1.85 million barrels per day bpd in December, up from 1.81…