The two cases happened in the early hours Cambridge Road and Burnaby Road.
Man Beaten Unconscious In Southampton
Two men arrested in connection with a serious assault in Southampton have been released without charge.
Officers were called out around 5am on Saturday 21 September, to reports that a man had collapsed on the ground on Standford Street in the St Mary's area.
He was taken unconscious to Southampton General Hospital with a serious head injury and remains there in a stable condition.
An 18-year-old man and a 17-year-old man were arrested on suspicion of grievous bodily harm and robbery, but have now both been released without charge.
Police are continuing their appeal for witnesses and would like to hear from a man and a woman who were seen walking along Chapel Road a couple of hours before the assault. They spoke with a taxi driver who had broken down.
It's believed they may have witnessed the assault or seen the offenders in the area.
Anyone with information is asked to contact southampton CID on 101 or the anonymous Crimestoppers charity on 0800 555 111.
Lewis Hine - who has a brain tumour - posted an inspirational film about his life, on his 16th birthday last week.
One of the men's targets was Ernest Jones in Portsmouth, taking £57,000 worth of watches.
Detectives Searching For Dash Cam Footage Around Gilpin Close.
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