Authorities arrested an individual Sunday and are still searching for another after a vehicle drove through a Joint Base Andrews security check point in Maryland.

Vice President Kamala Harris and other cabinet secretaries were soon to arrive on base when the breach happened, Joint Base Andrews said in a statement.

The incident unfolded around 9 p.m., when the vehicle drove through the security checkpoint and did not follow security personnel demands at the base’s main gate. The 316th Security Forces Group “immediately deployed the barriers and stopped the vehicle,” before two individuals fled, with one being apprehended, according to authorities.