A 32-year-old unidentified man fired four rounds at the multi-storeyed building housing HDFC Bank in Kanjurmarg on Tuesday. Lodha Group of builders owns the site where the bank is located.

“He walked into the compound and indiscriminately fired four rounds at the window panes on the bank’s ground-floor office,” said Inspector Tabaji Pawde.

“While leaving the premises, he dropped a paper with ‘Kumar Pillai’ written on it. The other floors of the bank were occupied, but there was no one on the ground-floor,” said an officer.

The police said the motive behind the firing seems to be extortion from the builder and it seems to be the handiwork of the Pillai gang.

On Monday, one Lafada Shetty opened fire at the office of developer Ramesh Shah in Vikhroli.

The police suspect Shetty to be a footsoldier of gangster Kumar Pillai, who had been sent to demand money.