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.
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Cloud giving way to brighter and colder conditions
Patchy rain with clear southern parts through Sunday. Becoming brighter.
Cloudy but mild with a chance of rain