Cops who were breaking up a loud party in Dorchester were reportedly punched and hit by a boombox by suspects who were arrested, according to Boston Police.

Early Sunday morning, police officers responded to the area of 4 Sumner Square for a report of a loud party. Responding cops saw multiple vehicles parked on the sidewalk along both sides of the street, blocking emergency vehicle access.

Officers reported that they could hear loud music, and saw a group of about 70 people at about 4:15 a.m. The cops told the group to leave the area, and the partygoers refused.

Then the officers reportedly saw 20-year-old Luca Delguado Santos, of Mattapan, “enticing the crowd by playing music from a portable boombox.”

“As officers approached the suspect, they advised him to turn the speaker off,” police said in a statement. “At this time, Santos swung the speaker and struck a police officer in the knee.”

The cops grabbed the speaker from Santos, and then a large crowd formed around the officers. That’s when a second suspect — 24-year-old Stephanie Ilma, of Mattapan — “became extremely aggressive towards officers and refused officers orders to step back.”

“Officers informed Ilma she was being placed under arrest, and she began to be combative by punching multiple officers,” police said. “A violent struggle ensued, and officers were safely able to place Ilma into handcuffs.”

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During the struggle, Santos reportedly jumped on top of the officers and tried to intervene in Ilma’s arrest. With the help of responding officers, Santos was also detained.

Then 20-year-old Miguel Martinez, of Boston, reportedly began to entice the crowd that was formed around the arresting officers. Cops told the suspect to leave the area, which he refused, and Martinez was subsequently placed under arrest.

After a search incident to arrest, officers recovered a taser from Ilma’s purse.

Santos was charged with assault and battery with a dangerous weapon, resisting arrest, interfering with a police officer, disorderly conduct, and disturbing the peace.

Ilma was charged with unlawful possession of a firearm (taser), assault and battery with a dangerous weapon to wit shod foot, assault and battery on a police officer, resisting arrest, interfering with a police officer, disorderly conduct, and disturbing the peace.

Martinez was charged with disorderly conduct, disturbing the peace, and interfering with a police officer.

All three suspects were expected to be arraigned in Dorchester District Court.