A Twitter spokesperson defended Hamas' ability to maintain a presence on the site, despite Twitter's rule against supporting and perpetuating violence. According to the spokesperson, the group's alleged commitment to peace and status as a democratically-elected organization exempts Hamas from the explicit rule banning terrorist organizations from the platform.
The Hamas Movement Twitter account, known as HamasInfoEn, claims to be the "official account" of the Hamas Movement in its banner on Twitter. While it is possible the account is not actually affiliated with Hamas, it has been cited in reporting by Haaretz, the Jewish Press, The Times of Israel, and others.
As recently as March, Hamas called for participation in a "Friday of Rage" on its Twitter account.
It also responded to Israel killing six Hamas terrorists with a threat: "We thwarted a dangerous Israeli scheme, retaliation to follow."