LONDON, Oct 20 Reuters Oil prices extended gains on Friday and were on track to rise for a second week on heightened fears that the IsraelGaza crisis may spread in the Middle East and disrupt supply from one of the world39;s topproducing regions.

Brent crude futures was up 75 cents to 93.13 a barrel by 0815 GMT. U.S. West Texas Intermediate crude was at 90.04 a barrel, up 67 cents. The frontmonth November contract expires on Friday.

The more active December WTI contract was up 81 cents at 89.18 a barrel.

Both frontmonth contracts are set to record a second weekly gain as an explosion at a Gaza hospital this week and an anticipated ground invasion by Israeli troops heightened fears of the conflict spreading in the Middle East.

The escalation of tension that we39;re likely to see with regard to the IDF Israel Defence Forces entering Gaza this weekend means the risk to crude oil are towards higher prices, IG analyst Tony Sycamore said.

Israeli Defence Minister Yoav Gallant told troops gathered at the Gaza border on Thursday that they would soon see the Palestinian enclave from inside, suggesting an expected ground invasion could be nearing.

Adding to the anxiety about the broadening of the conflict, the Pentagon said the U.S. had intercepted missiles fired from Yemen toward Israel.

Oil price are also supported by forecasts of a widening deficit in the fourth quarter after top producers Saudi Arabia and Russia extended supply cuts to the end of the year and amid low…