In a big crackdown, the Mumbai Police has exposed an inter-state racket offering lucrative international jobs to gullible senior citizens through social media and cheating them of huge amounts, an official said here on Wednesday.

Four persons, one from Mumbai and three from Bengaluru, have been arrested for the racket which has its tentacles in Maharashtra, Karnataka, Punjab, Tamil Nadu and other states, said Deputy Commissioner of Police (Crime Branch) Akbar Pathan.