Nepal police opened fire on Indian nationalsAccording to Kathmandu post:
SP Gangaram Shrestha, the APF district in charge, said the incident happened after four Indian traders who were turned away by the security personnel from the border returned with hundreds of people and began protesting at the border.
"They came back with hundreds of people to protest which soon turned violent. Our security personnel opened fire as the unruly mob started attacking them," said Shrestha.
According to Indian express:
Sources said the incident occurred inside Nepal in Sarlahi area, which is across the border from Sitamarhi in Bihar.
Sources in Sashastra Seema Bal (SSB), which guards the Indian side of the border, said the incident occurred at around 8.40 am when a Sitamarhi family, which has relations across the border, entered Nepal but were stopped by Nepal APF and an altercation ensued.