KABUL - Insurgents will try again and again to disrupt the security situation in Kabul, ISAF spokesman Brig. General Carsten Jacobson told Tolo news on Tuesday.
He said that Afghan Security Forces and ISAF are improving but warned that there were "determined" enemies who were not going to give up in their attacks.
"We always have to realise that there are determined insurgents out there, they will try, and they will try again and they will try again," he said.

But he was also optimistic that the security in Kabul will get better as the ISAF and Afghan security forces improve.
"We are very optimistic that we are going to get even better in securing the people of Kabul against attacks after these few quiet months, more so than we have been in the past," he added.

"We will do our best, we are getting better, ANSF are getting better but we have to aware we face a determined enemy."
He said that ISAF's investigation into Sundays' attacks across Afghanistan, concentrated on the capital, were underway, and stressed that some documents point in the direction of it being the Haqqani network.

"We have not made our assessment yet who might be finally behind this attack, but a lot of indicators and a lot of handwritings points in the direction of Haqqani. But Haqqani is only an element of the Taliban, so therefore we are looking at [other] insurgent groups who might behind this," he said.

"We have to analyse the situation with Afghan partners to come to a conclusion who might be responsible and how can we avoid this in the future."
Pentagon press secretary George Little said Monday that the Pakistan-based Haqqani network was likely behind Sunday's terrorist attacks.

"Initial indications are that the Haqqani network was involved in this set of attacks that occurred yesterday in Kabul," Little said.
Afghan President Hamid Karzai, despite praising Afghan security forces on Monday said that "it was a failure for our and NATO's intelligence".

In response to these comments, Little said he doesn't believe it was failure.
"I don't believe this was an intelligence failure. We did sense that something like this might happen," he added.

Insurgents launched a series of coordinated attacks in Kabul and three other eastern provinces of Afghanistan on Sunday afternoon.
Several insurgents stormed half-constructed buildings in Kabul and fired rockets and grenades on Western embassies and government facilities.

They resisted for 18 hours before Afghan security forces gunned down the last insurgent in Darulaman area of Kabul on Monday morning.
Taliban's spokesman Zabiullah Mujahid said the militant group claimed responsibility for the attacks. (Tolo News)