Two bomb blasts ripped through the Belgian capital during Tuesday's morning rush hour, claiming the lives of at least 31 people and leaving over a hundred injured.

The horrific events, which ISIS officials have claimed responsibility for, prompted an outpouring of Twitter posts from stars troubled by the latest European tragedy, just four months after the Paris attacks.

Jean-Claude Van Damme, known as The Muscles From Brussels, has now shared his sorrow at the bombings and added his condolences to the families directly affected by the blasts.

Taking to Instagram, he posted an image of a heart decorated in the colours of the Belgian flag, alongside the words, "Pray for our world".

"My heart goes out to the victims, their families and all the people of my home country Belgium on this sad, sad day," the Double Impact star wrote.

"I can't begin to explain the pain in my heart right now...," he continued. "Let's pray for our world my brothers and sisters". He concluded the post with the hashtag, "#PrayForBelgium".

Other stars to tweet about the tragedy online include Kim Kardashian, Gisele Bundchen, Kerry Washington, Iggy Azalea, and Ian Somerhalder, while Miley Cyrus has started brainstorming of ways to help victims of the Brussels attacks through her Happy Hippie Foundation, a non-profit organisation which aims to aid vulnerable youths, including the homeless and those in the lesbian, gay, bisexual and transgender (LGBT) community.