The two suspects in an Onset stabbing late Sunday night at the Onset VFW were ordered held without bail because of previous offenses, according to court documents.

The two suspects, 25-year-old Sean Somers of New Bedford, and 23-year-old Alex Somers of Mashpee, are both brothers and were arraigned on Monday at Wareham District Court.

Police found 22-year-old Matthew Hamilton of Bourne stabbed in the chest just before midnight on Sunday, according to Plymouth County Assistant District Attorney Bridget Middleton.

Hamilton was transported to Tobey Hospital and then med-flighted to Rhode Island Hospital. He is expected to survive, Middleton said on Monday.

Sean Somers is charged with two counts of armed assault to murder, one count of assault with a dangerous weapon, and one count of assault and battery with a dangerous weapon, one count of disorderly conduct, and one count of disturbing the peace.

Witnesses told police they observed Sean Somers "crouched in a fighting stance, swinging his arm back and forth in a slashing motion" late Sunday night.

According to court documents, a witness observed Sean Somers stab Hamilton in the right side of the body.

The incident followed the highly anticipated annual Cape Verdean Festival, which brought hundreds of people to Onset Village.

A witness to Sunday's incident reported that Sean Somers had visited the Cape Verdean Festival two years ago and, at that time, stated that he was from Hyannis and in the "GP" (General Pattern) gang, according to court documents.

Court documents also note that Sean Somers sprayed a can of mace at last year's Cape Verdean Festival and was told to leave.

Alex Somers is charged with assault with a dangerous weapon, disorderly conduct, and disturbing the peace.

Alex Somers, who also had a knife and was observed waving it at the crowd, was arrested after officers chased him behind the VFW, according to court documents.

Police could not recover the knives due to the large crowd gathered at the VFW, according to court documents.

Sean Somers was already due in court on Monday for a pre-trial hearing on charges of possession with intent to distribute a "Class D" drug, according to court documents. He was arraigned on that charge in July and was released on $500 cash bail, according to court documents.

Prosecutors in the case argued that the previous bail should be revoked and Sean Somers should be held without bail because "the defendant has violated an explicit condition of his release," and that "his further release will seriously endanger any person in the community," according to court documents.

Sean Somers was ordered held without bail for 60 days at the Barnstable County Jail, according to court documents. Bail for the new charges was set at $50,000.

A probable cause hearing for Sean Somers will be held on September 10 at the Wareham District Court, and Somers is scheduled to appear at Barnstable District Court on October 11, according to court documents.

Alex Somers was arraigned at the Barnstable Superior Court in November, 2011, on a charge of trafficking oxycodone. He posted the $10,000 bail at that time and was released, according to court documents.

Prosecutors also argued that the previous bail for Alex Somers should be revoked because "the defendant has violated an explicit condition of his release," according to court documents.

Alex Somers was ordered held without bail at the Barnstable County Jail for 60 days. Bail for the new charges was set at $10,000.

A pre-trial hearing for Alex Somers is scheduled for September 10 at the Wareham District Court. He is also scheduled to appear at the Barnstable Superior Court on September 11.

In 2010, police responded to a stabbing during the hours of the Cape Verdean Festival that sent one man to the hospital. Police at the time maintained that, though the stabbing occurred nearby the festival at the tennis courts in Onset, the stabbing had nothing to do with the festival.

Middleton said that she could not comment on any connection between the stabbing two years ago and the stabbing last Sunday.