Four people have been arrested on drug and weapons charges after a “report of a suspicious occurrence” at a downtown Denver hotel that is close to several events planned in conjunction with the upcoming Major League Baseball All-Star Game, police say.

Officers responding to a tip searched two rooms at the Maven Hotel a block from Coors Field on Friday night. Three men and a woman in their 40s were arrested, and two vehicles were impounded to be searched for evidence, Denver police say.

The men are being investigated for possession of a weapon by a previous offender, and the woman, who has a separate warrant, is being investigated on a drug charge.

“It’s been in Ohio as early as the mid-1850s at least, brought in as an ornamental plant because of its unique foliage and white flowers,” Gardner said. “It was actually planted in people’s landscaping, and it has been spreading.”

No other information was released, and police did not immediately respond to a request for comment Sunday.

“The investigation and arrests were the result of a tip from the public, serving as an excellent example of the critical role the community plays in public safety,” police said in a statement, adding that visitors should always be aware of their surroundings and report any suspicious or illegal behavior.

Coors Field will host the All-Star Game on Tuesday, but festivities have been underway in and around the ballpark and downtown for the last several days.