"We are detecting from the anti-government elements an attempt to show some spectacular attacks," secretary general's special representative Staffan de Mistura told the Security Council.
"I m afraid for the next few months for some tense security environment Our assessment is before it gets better it may get worse," he said briefing the Security Council on the latest situation in the country.
The UN envoy said facing an intense pressure in southern Afghanistan, Taliban were attempting to divert international attention by attacking in new areas particularly the more secure northern Afghanistan.
The envoy said the latest assessment show that Afghan forces for the first time in the last two years has begun to regain the military initiative.
Mistura said that conditions were becoming more favourable and there may soon be real opportunity for a political dialogue leading to a settlement.
The Security Council members later told that the recent elections carried out under difficult security conditions in Afghan. The full Afghan ownership constituted an important milestone in the vital political process in the country.
In his report, UN secretary general Ban ki Moon noted that, the election process was far from flawless, but he commended the Afghan electoral institutions and their independence and integrity for having organised such a complicated operation in a difficult, political, security and geographic environment.
Ban in his report covering past three months said, “the security incidence rose by 66 per cent compared to same period in 2009. The report documented a preliminary figure of 6215 conflict related civilian casualties over the ten month period including 2412 deaths and 3830 injuries."
The new report comes after media reports said that international troop casualties in Afghanistan had topped 700 in 2010.
(With inputs from PTI)