The sanctions come as travel bans and asset freezes aimed at President Vladimir Putin’s inner circle failed to force the country to meet an ultimatum to end support for separatists in two mainly Russian-speaking regions in eastern Ukraine.
Russia and Ukraine blamed each other for the downing of a Malaysia Airlines jet yesterday that killed all 298 people on board in an incident that may prove to be a turning point in the five-month conflict between their countries. The U.S. said this week that Russia is supplying the rebels with weapons.
I find the bold sentence ungrammatical. The sanctions seems to act as the subject for both come and failed here.
The only way for the sentence to be grammatical could be to regard asset freezes as the subject for failed, but obviously it won't work semantically. The sanctions include travel bans and asset freezes.
I would think it should be "the sanctions coming as travel bans and asset freezes aimed at President Vladimir Putin’s inner circle failed to force the country to..."
Please help me parse it.