"Congrats to @narendramodi and BJP. Look forward to working w/you/growing shared prosperity/security w/world's largest democracy," Kerry, who is travelling to London, twitted on the micro blogging site.
Kerry's remarks came after the White House congratulated the BJP on its historic victory and said it looks forward to working with the new government.
"US congratulates BJP on its victory in India's historic election; we look forward to working w/govt once formed to advance our partnership," the National Security Council (NSC) of the White House said in its tweet.