A Ukrainian commander had Russian troops in his sights but couldn't attack. He says a US rule is to blame.

• A Ukrainian commander said his unit was forced to watch as Russia amassed troops across the border.
• He said they weren't allowed to attack them with US-supplied weaponry, per the Times of London.
• If the US had lifted its ban, they could've taken out the troops and stopped an attack, he said.

A Ukrainian commander operating near the Russian border described how his unit watched as Russia amassed a huge force but had to wait for the troops to cross the border to hit them.