The incident took place last night at Bakhra village of the district and the woman's daughter managed to escape from being shot and reported the incident to the police.
Matihani Station House Officer (SHO) Sunil Kumar said the two, identified as Kiran Devi (55) and Murari Kumar (30) wre threashing wheat in their agricultural land last night when the woman's nephew Daulat Kumar came with a few persons and sprayed bullets at them.
Kiran Devi died on the spot, while Murari died this morning at a local hospital, he said.
Investigation is on in the case and raids are being conducted to net the culprits.