Klaus Petr's family want to know why the quiet and generous man was killed in an allegedly random attack while reading the bible near a Sydney train station yesterday morning.

Anne Petr last saw her husband when she dropped him off at work on Friday night for night shift.

He never returned home.

Anne Petr last saw her husband when she dropped him off for night shift on Friday evening. (9NEWS)

Klaus Petr was stabbed to death in what police allege was a random attack near Hurstville Train Station. (Image: AAP)

The 56-year-old was found stabbed to death at Hurstville Train Station in what police are alleging was a random attack.

"I never think anything like this happen to him at all," Mrs Petr told 9NEWS.

"He not get involved with anyone. When someone come to do something, maybe he just walk away."

A crime scene was established at the train station for most of yesterday. (9NEWS)

Police charged 29-year-old Brian Lee with murder after his brother phoned police. (Image: AAP)

Mr Petr had taken the train home to Hurstville Station after finishing work.

He was taking a moment to read the bible while eating his breakfast on a park bench when he was allegedly stabbed multiple times in the chest.

Less than an hour after the attack, 29-year-old Brian Lee was charged with murder after his brother phoned policed.

Mr Petr (top left) was reading the bible and enjoying his breakfast at the time of the alleged random attack. (9NEWS)

A bouquet of roses seen at Hurstville station. (9NEWS)

The knife allegedly used in the attack was found at the property.

Mr Lee did not apply for bail and it was formally refused.