Mumbai - Mumbai city is on high alert as 5-6 young men with rifles & bag packs were reportedly seen at Uran by school students. This was notified by school students. Along with Mumbai, Navi Mumbai is also on high alert. Mumbai security has been beefed up at beaches & coastal security is also tightened. Mumbai police spokesperson Ashok Dudhe has confirmed about the tight police security across Mumbai city. Central’s MARCOS team is also been sent to Uran for further investigation.Meanwhile, police are making sketches with the help of the school students.