Former president Bill Clinton has been hospitalized at a medical center in Irvine, California.
"On Tuesday evening, President Clinton was admitted to UCI Medical Center to receive treatment for a non-COVID-related infection," Clinton's spokesperson, Angel Ureña, shared in a statement on Thursday.
"He is on the mend, in good spirits, and is incredibly thankful to doctors, nurses, and staff providing him with excellent care," the statement read.
In a statement of their own, Clinton's physicians, Dr. Alpesh Amin and Dr. Lisa Bardack, said that the 75-year-old has been "administered IV antibiotics and fluids" as part of his treatment for the infection.
"He remains at the hospital for continuous monitoring. After two days of treatment, his white blood cell count is trending down and he is responding to antibiotics well," they said. "The California-based medical team has been in constant communication with the President's New York-based medical team, including his cardiologist. We hope to have him go home soon."
CARLO ALLEGRI/AFP via Getty President Bill Clinton in 1997
A source close to Clinton tells PEOPLE that the former president was in California on Clinton Foundation business when he felt fatigued and went to the hospital.
He was diagnosed with a urological infection that morphed into a broader infection, the source adds.
"He's up and about, joking and charming the hospital staff," the source tells PEOPLE.
CNN chief medical correspondent Sanjay Gupta reported during an on-air broadcast on Thursday that Clinton was in California for an event earlier this week when he started "not feeling well."
Joshua Roberts-Pool/Getty Bill Clinton at Elijah Cummings’ funeral
Citing Clinton's staff and doctors, Gupta said, "What they think is going on with the former president now is a blood infection, sometimes known as sepsis. This is a blood infection that is now being treated with IV antibiotics."
According to Gupta, the infection is "not related" to Clinton's heart and doctors will continue with antibiotic treatments "for at least another day" before recessing the situation.
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Clinton has a history of heart health issues since leaving the office in 2001. He had quadruple bypass surgery in 2004 after doctors found major blockages in his arteries and received two coronary stents in 2010 when he experienced a complication from the previous procedure.
In 2015, Clinton underwent a procedure to repair a partially collapsed lung.