Though no passenger or staff sustained any injuries, the window panes of the trains were damaged in the incident which occurred on Sunday in the Bengaluru division of SWR, they said. Three separate cases have been registered in connection with each of these incidents of stone pelting, officials said.

According to the SWR officials, the first incident occurred at 6.15 am when train (no 20661) Dharwad Vande Bharat Express was pelted with stones after passing Chikkabanavara railway station.

The second incident occurred at 3.20 pm when the train (no 20662) was running from Dharwad to Bangalore City Junction. The third incident was at 4.30 pm when the train (no 20608) from Mysore Junction to Chennai Central was pelted with stones before the Kuppam station in Andhra Pradesh. The fourth incident took place at 8 pm, when the train (no 20704) passed near Dharmavaram Junction in Anantapur district of Andhra Pradesh.

Cases have been registered under relevant sections of the Railway Act and an investigation is underway to nab the culprits, a senior SWR official said.

The Railway Protection Force have been patrolling vulnerable spots and sections in the Bengaluru division to prevent such stone-pelting incidents on trains, he said.