KIEV, Ukraine (AP) — In a somber show of U.S. support for Ukraine’s new leadership, Secretary of State John Kerry walked the streets Tuesday where more than 80 anti-government protesters were killed last month, and promised beseeching crowds that American aid is on the way.

Kerry met in Ukraine with the new government’s acting president, prime minister, foreign minister and top parliamentary officials. Speaking to reporters afterward, Kerry urged Russian President Vladimir Putin to stand down and said the U.S. is looking for ways to de-escalate the mounting tensions.