Five suspected members of the Maharashtra Navnirman Sena (MNS) on Tuesday smashed the glass at the entrance of an Airtel outlet here.

They were protesting against the private telecom major not using Marathi prominently in its customer interactive system, the police said.

According to Senior Inspector Prakash George, the five came on bikes and pelted stones at the outlet in suburban Bandra before speeding away. The employees told the police they had received a letter two weeks ago from the Raj Thackeray-led party, asking them to include Marathi in their IVR as the first language.