Manu Maharaj said that police got to know of their motive when they began the search to locate the three missing boys.
"Police managed to trace one of them Bipin Kumar, who said that they were not interested in studies and chalked out a plan to catch Dawood Ibrahim to make millions," he said.
Another police official, said that three boys were confident of nabbing Dawood Ibrahim.
"They decided to approach (Bihar's ruling Janata Dal-United legislator) Anant Singh for financial help to catch Dawood. They tried to meet Singh but failed."
According to police officials, the students decided to go ahead with plan when they were on way to school.
"First they visited a mall before leaving Patna and reached Mokama and then went to Kolkata.
"Soon after reaching Kolkata, they realized that mission is impossible.
"They soon decided to return home as they had few hundreds left with them," police officials said.
Manoj Jha, a police official, said two separate cases had been lodged.
Manu Maharaj said parents must teach children to concentrate on their studies.
A teacher of their school said on condition of anonymity that three three boys were least bothered about their studies.
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