LYNN – Police are investigating a home invasion early Wednesday morning where a teen told officers three masked gunmen robbed him of an iPhone.Police responded at 12:23 a.m. Wednesday to a report of a robbery at an apartment on Memorial Park Avenue.Lynn Police Lt. Rick Donnelly said Wednesday afternoon that a 16-year-old boy told police three masked gunmen knocked on his door and the teen opened it. The teen told officers he was then pistol-whipped and robbed.”The only thing taken was a white iPhone 4,” Donnelly reported the victim told police. Donnelly said the alleged incident remains under investigation.He said the only suspect description was of three masked males wearing dark-colored sweatshirts. No arrests have been made.Any person with information on the incident can submit an anonymous tip via text by texting tiplynn and the tip information to tip411 or 847411. Anonymous tips may also be submitted at the Lynn Police website.