Transformers star Shia LaBeouf was arrested in a Chicago drug store early Sunday morning, reports CBS News.

A security guard in a downtown Walgreens repeatedly told the actor, 21, that he was to leave the store because he appeared intoxicated, say police.

When LaBeouf refused, the guard alerted police. The arrest occurred at around 2:30 a.m.

Following his arrest, LaBeouf was described by authorities as "very courteous and polite."

Bond was posted before 7 a.m., police said.

Next year, LaBeouf is due to be seen in Indiana Jones and the Kingdom of the Crystal Skull.