WILMINGTON, Del. (USATODAY.com) -- Delaware Attorney General Beau Biden is undergoing medical testing at an undisclosed location in Houston after becoming "weak and disoriented" during a family vacation last week, according to Biden's spokesman Jason Miller and the White House.
Biden, the son of Vice President Joe Biden, sought treatment for his symptoms at hospitals in Chicago and Philadelphia last week.
The vice president accompanied the younger Biden to Houston on Monday morning to seek treatment, according to the White House statement.
The White House statement said, "Beau is being evaluated to determine the cause of an episode of disorientation and weakness that he experienced while on vacation with his family last week."
Biden felt weak and disoriented during a drive to Indiana last Wednesday, the attorney general's office said, and he sought treatment at Northwestern University Hospital in Chicago.
On Thursday, Biden, the oldest son of the vice president, was "feeling better" and consulted with his doctor at Jefferson University Hospital in Philadelphia about his symptoms, his office said. He was discharged and spent the weekend at his home in Wilmington, Del.
Biden tweeted a picture Sunday of him sitting alongside his father as they talked with members of the Newark National Little League team about the team's trip to the Little League World Series.
Biden suffered a mild stroke May 12, 2010. He was rushed to Christiana Hospital in Newark, Del., after complaining of a headache, numbness and paralysis. He was transferred to a hospital in Philadelphia and kept for observation until May 18. His current condition is unclear.
Biden spoke over the weekend with Chief Deputy Attorney General Ian McConnel "and has been in touch with his office this evening," his office said late Monday.
The White House and the attorney general's office said more details "will be forthcoming."