Young football fans watch dad, grandad beaten by police - Young Benfica fan watches on as riot police brutally attack father and grandfather after title win br br Portuguese police were out in force on the streets of Lisbon to quell potential unrest following Benfica winning the domestic league. br br WATCH horrific video of young Benfica fan witnessing Portuguese police beat up his dad and grandad after title celebrations turn ugly br br Horrific video footage has emerged of a young Benfica fan witnessing what is believed to be his father and grandfather being beaten up by police in Portugal. br br Benfica's celebrations for their first consecutive Primeira Liga titles since 1984 turned ugly when riot police dealt with supporters on the streets of Lisbon on Sunday. br br It is understood the family – a grandfather, his son and two grandchildren – were at the Benfica game in Guimaraes before they got into an altercation with police. The footage shows them try to detain the father, before an officer hits the grandfather twice in the face. The same officer then strikes his son, who is already on the ground, with his baton, and the camera shows the youngest of the two children being held by riot police. br br Benfica secured the Primeira Liga title with a 0-0 draw against Vitoria Guimaraes away from home br br Celebrations were held at the Marques de Pombal Square but the scenes turned ugly br br Riot police were forced into action as they were pelted with bottles and stones in Lisbon br br Horrific footage shows a young Benfica fan witnessing his father and grandfather being beaten up br br The father is struck by a police officer's baton when he is on the ground while the child is held on to br br br Horrified young Benfica fan witnesses police beat up dad and grandad br Horrified young Benfica fan witnesses police beat up dad and grandad br br Young football fans watch dad, grandad beaten by police br Young football fans watch dad, grandad beaten by police br br Young Benfica fan watches on as riot police brutally attack father and grandfather after title win br br Portuguese police were out in force on the streets of Lisbon to quell potential unrest following Benfica winning the domestic league. br br Terrified young Benfica fan witnesses riot police brutally beat his father and grandfather br br Terrified young Benfica fan, witnesses, riot police, brutally beat, father and grandfather, Young Benfica fan watches, riot police, brutally attack , father and grandfather, after title win, portugal, portugal police, br br A Benfica supporting dad & grandpa were beaten up by riot police in front of kids br br WATCH horrific video of young Benfica fan witnessing Portuguese police beat up his dad and grandad after title celebrations turn ugly br br Policija tukla dedu i oca pred očima malog deteta br Dete gledalo kako mu policajci tuku oca i dedu! br br Fudbaleri Benfike u nedelju su, kolo pre kraja prvenstva, remijem na gostovanju Vitoriji put u istoriji postali šampioni Portugalije.