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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A whistle-blower told ITV News some school buses were on the road without a valid MOT.
Birmingham Children’s Hospital is appealing for people with 4x4s or any other snow-worthy vehicles to help transport staff to the hospital.
Officials have confirmed that residents have been able to return home following a "large explosion" that injured three people early today.