Asked whether it was a terror attack, the minister said "it was too early to say anything and only an investigation will reveal it".
He said the two bombs were placed within a radius of 100 to 150 metres in Dilkhus nagar area in the Andhra Pradesh capital and placed in two bicycles.
"There were two blasts in Dilkhush nagar. I have spoken to the Chief Minister (Kiran Kumar Reddy) and he told me that the bombs were placed in two cycles and in one place eight people were killed and in other place three people were killed. 50 people were also injured," he told reporters here.