HONG KONG — The Chinese police arrested the husband of a Tibetan woman who died last week after setting herself alight in protest, an overseas group said on Monday, following a separate fatal self-immolation at a Tibetan Buddhist monastery over the weekend.

The two acts bring the number of self-immolations by Tibetans within China to 109 since February 2009, based on a count compiled by the Tibetan government in exile, which is based in Dharamsala in northern India.

The woman, Kunchoek Wangmo, set herself ablaze on Wednesday in Aba Prefecture, a heavily Tibetan area of Sichuan Province in southwest China, and her husband, Dolma Kyab, was detained by the police after he refused to blame domestic problems for her protest, said Free Tibet, a group based in London that campaigns for Tibetan self-determination. Aba is called Ngaba by Tibetans.

Alistair Currie, a media officer for Free Tibet, said that the group was not sure precisely when the man was arrested and that it had not received any more news about his case.