Can federal court stop state court's UD proceeding?

Hello, everybody;

We picked up a property through trustee's sale in northern Cal. Currently, the previous owners are suing the bank for wrongful foreclosure in the federal court. The trial is many months away due to the heavy workload of federal judges.

We have already filed the unlawful detainer lawsuit in the local superior court. The trial date is coming very soon. The foreclosed home owners, all of a sudden, changed the smooth UD flow by filing an "Ex Parte Emergency Motion" in the federal court to seek order to enjoin our UD action. Their blatan intention is to try to borrow the "superior" federal court power to suspend the state court's UD process.

Has anybody ever heard of any case law in which federal court could successfully interfere state court's UD action?

Many thanks