TMZ.com is reporting that “One Day at a Time” star Mackenzie Phillips was busted today for allegedly possessing heroin and cocaine and is in custody. The arrest happened at LAX at 10:00 AM, when Mackenzie Phillips, 48, was being screened by TSA.

Baggies and balloons which are believed to contain heroin and cocaine were discovered during the screening process at the Los Angeles International Airport.

Mackenzie Phillips has had a long and bumpy road with drug abuse, but she was supposedly drug-free for many years.