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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Nottinghamshire Police has charged a 23-year-old man with murder following the death of a 16-year-old girl.
Derby County defender Jake Buxton has today joined fellow Championship side Wigan Athletic for an undisclosed fee.
Rain overnight, clearing Wednesday morning. Showers possible by the afternoon.