The National Investigation Agency (NIA) has alerted Mumbai police regarding the movement of a suspicious person in the capital city of Maharashtra here, Mumbai police sources said. The NIA apprised the Mumbai Police through an email and stated that a person identified as one Sarfaraz Memon has reached the city and asked the police to be alert. The NIA email referred to Memon as “dangerous” to India. According to Mumbai Police sources, the NIA has informed that Memon, a resident of Madhya Pradesh has taken training in China, Hong Kong and Pakistan.