LONDON — The scandal surrounding Britain’s political class deepened Sunday with more allegations of sexual harassment, abuse of power, and other misdeeds, including new claims involving a key ally of Prime Minister Theresa May.

The allegations dating back more than a decade involve behavior that ranges from inappropriate touching and sending suggestive text messages to matters serious enough to be reported to police for possible prosecution.

First Secretary of State Damian Green, a senior Cabinet figure who is in effect May’s deputy, emphatically denied a Sunday Times report that police had found ‘‘extreme’’ pornography on his computer during an investigation nine years ago.

The allegations swirling through the British government in the aftermath of Hollywood’s Harvey Weinstein abuse scandal go far beyond Green and former Defense Secretary Michael Fallon, who stepped down last week after reports of inappropriate behavior by him surfaced. A rising number of legislators face similar allegations, and politicians in Scotland and Wales have been caught up as well.

Associated Press