Emergency crews were called to a property after receiving reports of a dog attack in Morayfield about 11.30am.
Queensland Ambulance Service confirmed one man in his 30s was treated by paramedics after receiving a “significant open wound” to his forearm.
He was rushed to the Royal Brisbane and Women’s Hospital in a stable condition.
A woman in her 40s and a man and a woman, both in their 20s, all suffered abrasions and were transported to Caboolture Hospital.
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The dog was seized by animal control officers, according to a City of Moreton Bay Council spokesperson.
“Council received a report from Queensland Ambulance Service this morning about a dog attack incident in Morayfield and is currently investigating,” the spokesperson said.
“Our thoughts go out to those who have been impacted.”