India, June 23 -- Amid rising tensions with Iran, the US has issued a new advisory for citizens warning of an "elevated threat environment" within the country. The notice, issued by US department of Homeland security (DHS), comes a day after US military struck three key nuclear sites in Iran.

The alert said the ongoing hostilities could inspire cyberattacks, retaliatory violence, and homegrown extremist activity.

"The ongoing Iran conflict is causing a heightened threat environment in the United States. Low-level cyber attacks against US networks by pro-Iranian hacktivists are likely, and cyber actors affiliated with the Iranian government may conduct attacks against US networks," the DHS bulletin said.

"Iran also has a long-standing c...