US sanctions have been imposed on two shipping firms as part of a crackdown on Iran's shadow fleet. The firms in question are based in Mumbai. This action is part of Operation Economic Outcast.

Further details about the sanctions and the firms involved are available from the source. The operation aims to target Iran's shadow fleet, but specific details about the firms and the implications of the sanctions are not provided here.

For more information on Operation Economic Outcast and the US sanctions, readers can refer to the source publication, Business Today.