An exchanged Samsung Electronics' Galaxy Note 7 is seen at company's headquarters in Seoul, South Korea, October 13, 2016. REUTERS/Kim Hong-Ji

SEOUL (Reuters) - Samsung Electronics Co Ltd 005930.KS will announce this month the results of an investigation into what caused some of its Galaxy Note 7 smartphones to catch fire, the JoongAng Ilbo newspaper reported on Monday citing unnamed sources.

The South Korean firm said in October it was examining all aspects of the phone, suggesting there may be a combination of factors that contributed to one of the costliest product safety failures in tech history.

The world’s top smartphone maker warned of a $5.1 billion hit to its operating profit over three quarters following its decision to permanently halt Galaxy Note 7 sales in October.

Investors and analysts have said it is critical for Samsung to identify the root cause of the fires in order to rebuild consumer trust and avoid repeating the same mistakes.

A Samsung Electronics spokesman declined to comment.