KABUL: In a phone call with US Secretary of State John Kerry, Hamid Karzai accused Pakistan of being behind a recent series of attacks and of blocking his government from striking a peace deal with the Taliban, the Afghan president's office said Sunday.

Karzai routinely makes such accusations against Islamabad, but his tone in recent days has been particularly pointed and direct.

They come after run of three attacks in five days in the capital Kabul, the latest a Saturday machine-gun and rocket-propelled grenade barrage of the country's electoral commission ahead of general elections set for next week.

Karzai told Kerry on Saturday the attacks were complex in nature and stage-managed by ''foreign intelligence agencies,'' a reference to Pakistan's Inter-Services Intelligence.

He also told Kerry that he did not accept US arguments that it had no influence ''over countries that support terrorism,'' and said US refusal to go after the Pakistani intelligence agency could further hurt US relations with Afghanistan.

The Taliban have claimed responsibility for the recent violence in Kabul.

Very few analysts accept Karzai's allegations that Pakistani intelligence agencies and not the Taliban are staging attacks.

Pakistan denies that it is assisting the Taliban.

Karzai is not allowed to run for re-election in the April 5 ballot, as he is barred by the constitution from seeking a third term in office.

He is seen as positioning himself for life after the presidency, depicting himself as a tough-speaking nationalist.

Karzai has also refused to sign a Bilateral Security Agreement with the United States which would allow for the US and Nato to leave behind a residual force of about 12,000 soldiers after the final withdrawal of international combat troops takes place at the end of this year.

Despite widespread support for the agreement, Karzai says he first wants the US to move forward with a peace pact with the Taliban, presumably by putting pressure on neighbor Pakistan.

During the telephone conversation, according to the Afghan presidency, Karzai told Kerry that the Taliban were willing to talk to his High Peace Council, an 80-member body tasked by the president to spearhead reconciliation with his armed opposition, but Pakistan was preventing them.

The presidency did not provide further details.

The Taliban has denied any talks with Karzai and says it does not want to speak with the Afghan president.

However several Taliban leaders have met with members of Karzai's High Peace Council in the United Arab Emirates, according to both Taliban and high peace council members, who have previously spoken to The Associated Press on condition of anonymity so as not to disrupt the delicate diplomacy.

Also on Sunday, a roadside bomb killed a service member with the international military coalition in Afghanistan in a southeastern province, said Coalition spokesman Capt. Patrick Simmons.

Most of Afghanistan's security is now in the hands of the Afghan National Security Forces ahead of the withdrawal of international combat troops at the end of December.

Still, international service personnel occasionally patrol troubled areas and assist Afghan troops when requested.

A stubborn insurgency still rages in Afghanistan's south and east.