Authorities arrested two individuals Thursday, including a fourth suspect in the March 6 shooting in the Sunset Zoo parking lot.

Officers with the Riley County Police Department conducted a search warrant in the 1500 block of Hillcrest Drive, uncovering illegal drugs and guns. The investigation led to the arrests of 20-year-old Manhattan residents Thesiaus Robinson and Sierra Wells.

Both are charged with distribution of marijuana, criminal use of weapons, two counts each of distribution of a controlled substance and possession of drug paraphernalia. Robinson faces additional drug charges and was also arrested for aggravated robbery in connection to the March 6 incident.

Wells is free after posting a $25,000 bond. Robinson remains jailed on a $45,000 bond for the drug and weapons charges. The aggravated robbery charge bond and judicial review are pending.