(CNN) – President Barack Obama on Friday called the family of a campaign staffer who collapsed in the Chicago headquarters and later died, Obama's campaign said.
The staffer, 29-year-old Alex Okrent, worked in the campaign's advertising department, the Chicago Sun-Times said in a report, which campaign officials acknowledged was accurate.
The president offered his condolences to Okrent's family and spoke with other members of his campaign staff in a conference call, his campaign said.
Obama was campaigning in Virginia on Friday.
Okrent had worked on Obama's 2008 presidential campaign and his 2004 U.S. Senate campaign, the Sun-Times report said.
on Friday evening, Obama tweeted, "A beloved member of our campaign family, Alex Okrent, passed away today. Our prayers are with his loved ones. We will miss you, Alex. -bo." Obama's organization has said the initials indicate the tweet is from the president.
Presumptive Republican presidential nominee Mitt Romney and his wife, Ann Romney, acknowledged Okrent in a tweet after the news emerged.
“Ann & I were deeply saddened to learn of the death of Alex Okrent,” he tweeted. “Prayers are with Alex’s loved ones and the entire Obama campaign team.”
David Axlerod, a senior adviser to Obama’s campaign, tweeted in reply to Romney: “Thank you, governor. Alex was a beloved member of our team. It's been a very emotional day.”
No further details were immediately available.