© Peter Nicholls / Reuters
The group's co-founder Julian Assange suggested on Dutch television that if Rich is the source of the 20,000 emails exposing the party's sabotage of the Bernie Sanders campaign in favor of Hillary Clinton, he may have been killed over it.
However, when asked if Rich was a Wikileaks source, Assange refused to comment, merely saying they were investigating the circumstances surrounding his murder.
Wikileaks tweeted about the reward on Tuesday for information leading to the "conviction for the murder of DNC staffer Seth Rich."
Rich worked as voter expansion data director at the DNC before he was shot twice on his way home on July 10. He died later in hospital.
"If it was a robbery — it failed because he still has his watch, he still has his money — he still has his credit cards, still had his phone so it was a wasted effort except we lost a life," his father Joel Rich told local TV station KMTV.
Assange made his comments on Dutch television show Nieuwsuur. When asked why he was commenting on Rich's murder, he said, "Because we have to understand how high the stakes are in the United States."
Wikileaks offers a secure upload submission option in which no identifying data about a source is recorded, according to the whistleblowing website.
Under these circumstances, Assange and Wikileaks staff would not know who sent them the DNC emails.
© Metropolitan police
The Metropolitan police posted a reward for information on Rich’s murder.
The Metropolitan police posted a reward for information on Rich’s murder.
Wikileaks also claimed on Tuesday that Ecuador were being pressured to end Assange's asylum in their London embassy over fears the leak could damage the country's reputation with the US.
Social media ignited in reaction to the Wikileaks tweet with a range of jokes and conspiracy theories.
Comment: Update: Sort of confirming they were behind the hit, Killary's team now wants to add Assange to the Clinton Body Count: