Israeli Prime Minister Ariel Sharon is seen attending a ceremony at the Prime Minister's office in Jerusalem, Wednesday, Jan. 4, 2006

Two senior U.S. envoys have delayed a trip to the Middle East this week after Israeli Prime Minster Ariel Sharon suffered a major stroke.

A State Department spokesman said the trip, set to begin Thursday, would be rescheduled.

The envoys were to meet with Israeli and Palestinian officials in an effort to prevent delays in Palestinian legislative elections set for January 25.

Palestinian leader Mahmoud Abbas has said he may postpone the vote if Israel makes good on a threat to block voting in East Jerusalem.

Thursday, Mr. Abbas expressed concern for Mr. Sharon's medical condition, but said it would not affect the election.

In Jerusalem, Israel's acting Prime Minister Ehud Olmert said the Israeli government is fully operational.  Officials said Israeli elections set for March 28 will be held as scheduled.

Some information for this report provided by AP.