Sukhbir, who holds the Home portfolio, also said Pakistan's ISI has "big plans" to destablise the state by targeting important leaders, before 2017 Punjab assembly polls.
"All radical groups have aligned with AAP and I am saying with responsibility. I personally feel the government of India should clearly investigate the funding of the AAP," he alleged while addressing media here.
He also accused Delhi Chief Minister and AAP's national convener Arvind Kejriwal of meeting representatives of radical groups regularly, which he said was "unfortunate".
"Radical leaders like Mohkam Singh are trying their best to utilise the 2017 Punjab elections as an opportunity to destablise peace and harmony attained by people of Punjab after great sacrifices," he claimed.
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Expressing concern over the recent incidents in the state, Sukhbir claimed that the ISI "had plans to target important leaders", besides designing sacrileges to destablise peace and harmony of the state.
"ISI has big plans to destablise Punjab before elections. They have plans to target important leaders and engineer sacrilege incidents. We have already conveyed this information to the Union Home Minister and National Security Advisor one month back," Sukhbir said.
Punjab government has been facing mounting pressure from several quarters for several incidents including attack on RSS volunteer in Ludhiana, murder of Mata Chand Kaur, attack on Sikh preacher Ranjit Singh Dhadrianwale and the recent attack on RSS leader Jagdish Gagneja.
Replying to queries regarding status of investigations in each case, Sukhbir said investigations into Gagneja case was in "advanced" stage and other cases were also being investigated.
Appealing voters to be "wary" of the "blatant lies" of
He also claimed that the state had witnessed "development on all parameters of progress" with Parkash Singh Badal at its helm.
"All the welfare centric schemes like - Atta-Dal scheme, Shagan scheme, free power to farmers, free power worth 200 units to the SC households, free health insurance scheme were initiated by the SAD-BJP government," he said.
"The SAD-BJP combine has put the state on top of the developmental chart during the past nine years and made it a power surplus state," he added.