Luminus Network for New Americans has some guidance for places of worship on immigration enforcement. 

In summary, places of worship are not obligated to enforce immigration laws and are generally considered sensitive locations. While immigration officials can enter public areas of a place of worship, they require a warrant to enter private spaces. It is important for places of worship to understand their rights, prepare internal policies, and provide resources to protect their congregants.

Read more at https://www.beluminus.org/placeofworship/.