Pakistan, Oct. 6 -- The United States has warned foreign financial institutions that they could face sanctions for continuing business with Iran. The US Treasury Department said action could be taken without advance notice against banks supporting Iran's financial sector.

Read More: Pakistan eyes bigger China swap line, expects US financing

Treasury urged foreign banks to immediately end transactions and relationships involving sanctioned Iranian financial institutions. It warned that institutions facilitating Iran's access to the global financial system could be targeted at any time.

The warning comes as Washington intensifies financial pressure on Tehran amid the ongoing conflict. US authorities have increasingly warned foreign gover...