India has found itself at the centre of a growing geopolitical clash, as fresh EU sanctions targeting a Russian-linked refinery in Gujarat spark concerns over energy autonomy and rising global pressure.

"The suitcase was found to contain an American Colt Commander, .45 caliber with three empty magazines," Russian officials said.

The European Union on Friday agreed an 18th package of sanctions against Russia over its war in Ukraine, including measures aimed at dealing further blows to the Russian oil and energy industry.

The Russian customs agency said it detained a dual U.S.-Russian citizen at an airport in Moscow after she was found with a gun and a bank check for $138,000.

The British government sanctioned three Russian intelligence units after an uptick of cyber and arson attacks.

U.S. President Donald Trump's decision to ramp up arms shipments to Ukraine is a signal to Kyiv to abandon peace efforts, Russia said on Thursday, vowing it would not accept the "blackmail" of Washington's new sanctions ultimatum.