(CNN) - Sen. Frank Lautenberg, D-New Jersey, was hospitalized Monday after taking a fall, his spokesman said.
The 86-year-old Lautenberg, who is in his fifth term in the Senate, was taken to the hospital as a "precautionary measure," spokesman Caley Gray said.
"The senator is in great spirits and joking with the doctors," Gray said.
He will remain at the hospital overnight for observation, Gray said.
UPDATE: Communications Director Caley Gray says Lautenberg was diagnosed with a bleeding ulcer Tuesday morning and "underwent a successful endoscopy procedure to treat it."
"After becoming lightheaded and taking a fall as a result of the condition, the Senator sought medical attention last night. The Senator is expected to make a full recovery and will be back to work soon," said Gray.
–CNN's Deborah Doft and Evan Glass contributed to this report.
Get well soon.
Franks a great guy and leader.Get well soon my friend.
Get well soon Senator!
From a hardcore GOP and a Dem. despiser ,sorry,hope you are OK seriously,My Dad fell @ 86 and do not wish that on anyone,anyparty,anycolor.You do serve your country.
Get well soon, Senator Lautenberg.
I pray for a speedy recovery for Sen. Lautenberg and hope that I am lucky enough to be so healthy at 86!
By the way those of you that cry term limits every time an older person is in office consider that there are term limits.. these guys are up for re-election after every term. Why stifle the will of the people?
Thank you Frank for your 5 terms. Hope you get well and enjoy your retirement.
Roll in the new. Sorry but after 70 there should be no room in our politics
Get well fast Senator Lautenberg we need your seasoned intelligence in the Senate.
Get well Senator. But this is another argument for term or age limits.
Get well soon Senator Lautenberg! We need you back ASAP and
President Obama certainly needs your support.
Mr. Lutanburg get well soon! I am a former New Jersey Person. Keep the jokes going. Why did the doctor see prices high? because the inflation was lonely about it. Get Better!