Johnny Depp reportedly needed surgery on his hand after punching a wall during an argument with Amber Heard.

Johnny Depp

Johnny Depp

The 52-year-old actor flew back to the US from Australia in March 2015 after sustaining an injury while filming 'Pirates of the Caribbean: Dead Men Tell No Tales' and sources have now told 'Entertainment Tonight' the damage was caused during an explosive row with his estranged wife.

Details surrounding the actor's injury - which saw him need a pin inserted into his finger - were never revealed but it was reported at the time that it never occurred during filming.

The Los Angeles Police Department are now investigating Amber's domestic violence allegations.

The 30-year-old actress originally declined to give a statement to police when they were called to her and Johnny's home last week after he allegedly threw an iPhone at her face but her lawyers claimed the 'Black Mass' star and his team "forced" her into making a statement by the way they have acted and police are now looking into it.

A spokesman for the LAPD told Variety that it "always investigates" such allegations.

Amber filed for divorce from Johnny last week and was granted a temporary restraining order against him after claiming he assaulted her and lawyers for the actress have now alleged that she suffered "years of abuse" at the hands of the actor.

Amber's legal team claimed the 'Magic Mike XXL' star never planned to speak out about the domestic abuse to "protect her privacy and Johnny's career" but he forced her to go public.

Samantha F. Spector and co-counsel Joseph P. Koenig said: "As the result of Amber's decision to decline giving an initial statement to the LAPD, her silence has been used against her by Johnny's team. Amber did not provide a statement to the LAPD in an attempt to protect her privacy and Johnny's career.

"Johnny's team has forced Amber to give a statement to the LAPD to set the record straight as to the true facts, as she cannot continue to leave herself open to the vicious false and malicious allegations that have infected the media. Amber has suffered through years of physical and psychological abuse at the hands of Johnny."