ALMARSAD Breaking News relayed figures on WhatsApp for results. The sources did not specify the country or election the figures refer to, and the figures have not been independently verified.
According to the service, Democrats won 105 seats in the House of Representatives against 62 for Republicans, based on the latest update of results so far.
In the Senate, Democrats won 45 seats against 36 for Republicans, according to the same update.
An earlier update had reported that Democrats held 40 Senate seats and Republicans held 31. That update came at an earlier stage of the count.
The sources did not identify the origin of the figures or the share of votes counted. No final result is available yet.