D.C. Council member Marion Barry will spend Tuesday night in the hospital after the 77-year-old diabetic said he experienced a drop in blood sugar.

Barry (D-Ward 8) tweeted around 8:30 p.m. that he’s been admitted to the hospital for what he described as a non-life-threatening condition.

“I’m a 20 year-diabetic,” the former mayor wrote. “Today, my sugar dipped below normal, and I was taken to the hospital by the fire dept., but nothing life-threatening.”

In a subsequent Tweet, Barry wrote that doctors will keep him overnight for observation.

“Thank you for all of your prayers,” wrote Barry, who has also been treated for prostate cancer and received a kidney transplant in 2009.

Barry’s chief of staff, Joyce Clements Smith, said Barry went to the hospital after he started feeling weak while going about his normal course of duties Tuesday. Smith declined to say what hospital Barry is being treated at, called it a privacy matter.

In recent years, Barry has been hospitalized with greater frequency.

In May, Barry was hospitalized while in Las Vegas for a convention after suffering a blood clot. He was also hospitalized in January 2012 for a minor operation for a urinary tract infection.

A month later, Barry fell ill after Mayor Vincent C. Gray’s State of the District speech. An ambulance was called, but later cancelled. Barry said at the time his blood sugar had dropped, but he felt better as soon as he ate.