They were among hundreds of people who had gathered to watch the local hockey match at Sagbahal under Talsara police station area.
The match was called off half way through when it started to rain.
Several people, including the five victims, took shelter under a banyan tree that was struck by lightning, police said.
The hockey match between a local team and another from outside was part of a tournament popular among the local tribal community.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.