India's markets regulator has widened an investigation into alleged market manipulation by U.S. securities trading firm Jane Street to include other indexes and exchanges, a source familiar with the matter said.

India’s stock market regulator has banned Jane Street from dealing securities in the country, accusing the New York-based trading firm of a “sinister scheme” to manipulate derivatives markets. The Securities and Exchange Board of India said its decision to limit Jane Street’s access to India’s securities markets stemmed from a months-long investigation.