The incident came to light three days ago and police have today arrested two accused -- Narendra Singh and Gyanendra Chaudhary -- in this connection, OmPrakash, SP, Meerut said.
According to preliminary investigation, more persons are said to be involved in the crime and efforts are on to nab them, he said.
The tunnel originated underneath a plot owned by Narendra Chaudhary while the point where the hole was drilled in the pipeline is beneath a plot owned by Gyandendra Choudhary, Om Prakash said.