Taliban fighting normally quiets down in winter months with the insurgents resting ahead of an annual spring offensive, but this year has seen a series of fierce attacks -- many focused on Kabul in recent weeks, including three in the capital since Friday.
Some say the ongoing fighting is a bid by Taliban leader Mullah Akhtar Mansour to consolidate his position ahead of four-way talks between Afghanistan, Pakistan, the US and China slated for next week, a precursor to a revived peace dialogue between Kabul and the insurgents.
"We've never had such a winter offensive before from the Taliban. That winter is going to roll into a continuous spring-summer offensive," he told AFP.
"That is looking very dangerous. Mansour is consolidating his position. If he's seen as a military success they will remain loyal to him.
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"Military success also de-legitimises the anti-Mansour faction that is emerging," he said, referring to the recent formation of a splinter group challenging his rule.
But Pakistan -- seen as one of the few countries with influence over the insurgents -- is also playing a role, regional analysts said.
"The Taliban do not have the authority to decide on peace talks, they are controlled by others," said Zalmay Wardak, a Kabul-based military analyst, referring to Pakistan.
In recent years Pakistan has officially re-oriented its Afghan policy, disavowing the use of surrogate fighters such as the Taliban to achieve its foreign policy goals in Afghanistan, where it is seen as fighting a proxy war with India.
But two spectacular attacks on Indian interests since the weekend -- a 25-hour siege on India's mission in the northern Afghan city of Mazar-i-Sharif that ended Monday, and a bloody weekend assault on an air base in India -- could signal the desire of elements within the powerful Pakistani military to scupper peace efforts between the two countries, one analyst suggested to AFP.