Two Eastern European men have been arrested in connection with the explosion near Aisha Mosque in Walsall last month.
The 25-year-old and 22-year-old were arrested just before 3pm today.
Police are searching an area of Talbot Way in Small Heath and as a precaution homes have been evacuated.
More top news
As official investigations begin, a timeline shows how a devastating fire destroyed part of the University of Nottingham's Jubilee Campus.
A fraudster conned a council into letting her buy her council house with a massive discount - despite owning and living in a second property
A rather cloudy morning with outbreaks of rain easing. It will then turn brighter during the afternoon with sunny spells.