A 15-year-old girl from Saitama, Japan has escaped a two-year long imprisonment after her captor inadvertently left his door unlocked, allowing her to escape, police tell CNN.

The teenager was abducted in 2014 and allegedly held in apartments in Tokyo and Chiba prefecture. She was able to escape from an apartment in Nakano Ward, Tokyo, on Sunday and called her mother before alerting police.

Her alleged abductor, Kabu Terauchi, a 23-year-old university graduate, was detained in Shizuoka prefecture. He was discovered in Ito, Shizuoka prefecture early Monday morning, around 100 km (62 miles) southwest of where the girl was found.

He was covered in blood and holding a box cutter, a Saitama prefectural police public affairs official said.

He had reportedly tried to kill himself to avoid arrest but survived and is recovering in a hospital from self-inflicted injuries to his neck. He will be formally arrested when discharged.

Local media report that the girl told police she escaped when her captor had gone to the electronics district of Akihabara to buy a mobile phone and forgot to lock the door when leaving.

The girl, who remains unnamed, disappeared in March 2014 after she came back from her school in Asaka, Saitama prefecture.

A note was left in her home post box then, saying that she was going to stay at her friend’s house for the time being and that there was no need to look for her. (CNN)

•Photo shows Police officers carry a sheet-covered computer from the apartment of abduction suspect Kabu Terauchi on Monday.