Turkey's $6.5 billion annual trade volume with India is "not enough" and should be boosted, Turkish President Tayyip Erdogan said on Monday.

"I think it would be beneficial to raise it to $10 billion," he told a joint news conference with Indian Prime Minister Narendra Modi in New Delhi broadcast on state television channel TRT Haber.

Erdogan also said he believed India would take steps to expel the domestic network of Muslim cleric Fethullah Gulen, who Ankara accuses of orchestrating a failed coup in July.