Nangarhar police chief Mohammad Sharif Amin told Reuters that a bomber detonated a car packed with explosives outside the consulate and an adjacent mosque.
The consulate was the intended target, he said, but most casualties were from the mosque.
Roads near the Indian consulate remained blocked as gunfire rattled through the area, deputy provincial police chief Masoom Khan Hashimi said.
Indian diplomatic missions have been targets of previous attacks in Afghanistan.
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A truck loaded with sand collided with a school bus carrying children aged between three and 12 years old in Uttar Pradesh.
BA said the strikes will impact "only 1 per cent of our total scheduled flights across the three days."
It's another mild day in the north and west, but cold in the south and central England.