TURIN, Italy, Feb. 18 A day after at least 11 people were killed in Libya amid continuing violence over the Danish cartoons of the Prophet Muhammad, an Italian government minister resigned Saturday for wearing a T-shirt printed with the cartoons.

The protesters in Libya, angry over the minister"s T-shirt, had stormed an Italian Consulate in Benghazi on Friday and were fired on by Libyan soldiers. Here in Italy, critics of Roberto Calderoli, the reforms minister who showed off his T-shirt on television earlier this week, blamed him for the violence and even his own political allies, including Prime Minister Silvio Berlusconi, demanded his resignation.

In London, some 10,000 demonstrators marched in what was the largest of several protests there so far. And in India, a politician offered a reward for the deaths of the cartoonists.

Mr. Calderoli, the Italian minister, quit under apparent protest, warning against an Islamic "attack on the West."

"In these last days I expressed in my way solidarity with all those who have been struck by the blind violence of religious fanaticism," he said in a statement that referred to an Italian priest killed this month in Turkey by a Muslim who was reportedly angry over the cartoons. "But it was never my intention to offend the Muslim religion nor to be the pretext for the violence of yesterday," he said.

With the dispute over Mr. Calderoli"s shirt, the violence over the cartoons breached Italy"s domestic politics. Mr. Calderoli belongs to a far-right party, the Northern League, that is small but influential. It is a key member of Mr. Berlusconi"s center-right ruling coalition.

Mr. Berlusconi and the Libyan leader Muammar el-Qaddafi discussed the demonstration by telephone, with both agreeing that it should not have "negative repercussions" on their relationship.

In Libya, the riots also claimed a political casualty. Libya"s interior minister was suspended for "an excessive use of force" against the protesters there, The Associated Press reported. At least 11 people were killed in violence there on Friday, the bloodiest protest yet over the cartoons.

In central London, thousands of Muslims from across Britain chanted "Allah-u akbar" ("God is great" in Arabic) and waved placards in protest of the publication of the cartoons in Danish and other European newspapers. The cartoons were shown briefly on the BBC but have not been published by British newspapers.

The protest, which gathered under Nelson"s column in Trafalgar Square, drew at least 10,000 protesters, the police said, making it the biggest of three demonstrations in London in three weeks. Referring to the cartoons, one demonstrator, Mohamed Abdul Kabir, a 23-year-old psychology student from Accrington in the northwest England, said: "It has gone beyond satire; it has gone to insult. Who defines the line where freedom stops?"

In India, a politician in the nation"s largest state has offered an $11 million reward for the killing of any of the Danish cartoonists "who dared to make the caricature of the Prophet," according to Indian media reports published Saturday. The state government official, Haji Yaqoob Quereshi, made the announcement at a rally in the north Indian town of Meerut after Friday Prayer. State officials said he would not face charges because he was articulating his personal opinion. Demonstrations have broken out over the last several days in a number of Indian cities with large Muslim populations.

Alan Cowell contributed reporting fromLondon for this article, and Somini Sengupta from Goa, India.