WASHINGTON, Oct 2 - The Pentagon is warning Congress that it is running low on money to replace weapons the U.S. has sent to Ukraine and has already been forced to slow down resupplying some troops, according to a letter sent to congressional leaders.

The letter, obtained by The Associated Press, urges Congress to replenish funding for Ukraine. Congress averted a government shutdown by passing a short-term funding bill over the weekend, but the measure dropped all assistance for Ukraine in the battle against Russia.