Former US President George H W Bush is being treated at a Houston hospital for complications related to bronchitis and is in a stable condition.
He is expected to be released within the next 72 hours.
The Houston Chronicle reported that Mr Bush, 88, has been in the hospital for a week.
President Bush has been in and out of The Methodist Hospital in the Texas Medical Center being treated for complications related to his bronchitis," his office said in a statement released by the hospital.
"He is in stable condition, and is expected to be released within the next 72 hours."
Mr Bush, a Republican and the 41st president of the United States, took office in 1989 and served one term in the White House.
The father of former President George W Bush, he also served as a congressman, UN ambassador, envoy to China, CIA director and was vice president for two terms under Ronald Reagan.
As president, Mr Bush routed Iraq after Saddam Hussein invaded Kuwait in 1990 and his approval ratings soared to the 90% range.
But just 20 months later he was defeated in his re-election bid by Democrat Bill Clinton.