India's Federal Home Minister Sushilkumar Shinde said the bombs were attached to two bicycles about 150m (500 feet) apart, the Associated Press reports.
He said eight people died in one explosion and three in the other.
More top news
Talks at Stormont aimed at restoring power-sharing have adjourned with little sign of the DUP and Sinn Fein reaching an agreement.
On Wednesday, the rain will roll northwards - a few hours of solid rain in the east and over the Pennines.
Jeremy Corbyn has challenged Theresa May to better fund the police and fire services by backing a Labour amendment to the Queen's Speech.