Emergency services in the Balearic archipelago tweeted that a man and a woman were found near Arta, one of the affected towns, "close to the area" where the auto of a missing German couple had been found. Images posted on social media showed cars being swept along narrow streets by torrents of brown water.
The UK Foreign Office is supporting families of two British people who are among those to have died.
Two of the victims were British, a senior official from the San Llorenc mayor's office, Antonia Bauza, told radio station Cadena Ser.
The floodwaters tore down trees, swept numerous cars and trucks into piles of twisted metal and buried streets under mud.
Rescue workers reportedly found the auto submerged and on its side at the mouth of the torrent in S'Illot at 2am (1am BST) on Wednesday.
Diario de Mallorca reported that the bodies of an 81-year-old man and 83-year-old woman were among the first to be found on Tuesday.
There have been at least ten deaths after devastating floods hit Nadal's native island off the coast of Spain.
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A source in the Russian space agency said that rescue workers had reached the crew. "The teams are en route to the landing site". A Soyuz rocket carrying crew members to the International Space Station (ISS) malfunctioned during a launch in Kazakhstan .
"It all happened in less than 10 minutes", an unidentified witness with wet clothes told the public broadcaster TVE.
Others were caught on the road, unable to reach their houses.
Another resident, Tomas Oliver, cleaned his house as he celebrated that all the damage in his household had been material.
Footage broadcast on Spanish television showed raging, muddy waters rushing down roads, houses flooded and vehicles piled on top of each other after the Mediterranean island was pounded with heavy rain in just a few hours. The Spaniard holds the all-time record of 10 straight years of winning at least one major.
The regional government called an emergency meeting, and authorities said 630 rescue workers and military units had been sent to the area to help.
Meanwhile tennis star Rafael Nadal, who is from the island, was seen joining in with the clean-up effort.
The flooding forced schools to close and displaced people to shelter in sports halls.