* Congo Republic holds presidential vote

* Low turnout but president set for another 7-year term

* Opposition calls for boycott, EU sends no observers

(Refiles to clarify in headline that there is only one election)

By Christian Tsoumou

BRAZZAVILLE, July 12 (Reuters) - Congo Republic voted on Sunday in an election widely expected to give President Denis Sassou-Nguesso another seven years in power, but turnout appeared low after an opposition boycott.

There were no reports of widespread violence, but scuffles were reported between former militia fighters and soldiers in the volatile Pool region, scene of fighting during a 1997-2002 conflict in the central African state.

Investors seeking to diversify the economy in Africa's fifth biggest oil producer are watching to see whether the vote sparks a repeat of the conflict and rows that have marred previous elections and disrupted political and economic stability.

"There have not been big crowds," Roger Bouaka, executive director of Congolese Human Rights Observatory.