WASHINGTON – As U.S. forces become more engaged with the enemy in Afghanistan, there may well be a rise in American casualties, Vice President Joe Biden said recently.

In an interview on CBS’ “Face the Nation,” Biden described the security conditions in Afghanistan, Pakistan and Iraq – a trio of countries he recently visited – and President Barack Obama’s decision to close the U.S. detention center in Guantanamo Bay, Cuba.

He said Afghanistan has deteriorated due to a failure to provide sufficient economic, political and military resources, as well as a lack of coherent policy among allies involved there. The Taliban are in “effective control” of significant parts of the country, he added.

“The bottom line here is we’ve inherited a real mess,” he said. “We’re about to go in and try to essentially reclaim territory that’s been effectively lost.”

Biden said more troops are necessary in Afghanistan, where an estimated 25,000 additional U.S. forces are expected to deploy over the next 12 to 18 months, according to defense officials. Some 34,000 U.S. servicemembers currently are there.

“It’s going to require … some additional military forces. There are going to be additional efforts to train their police and to train their Afghan army,” he said. “And all of that means we’re going to be engaging the enemy more.”

Describing other factors in Afghanistan, the vice president said corruption is rife among the ranks of Afghan National Police, and that the country is the source of 95 percent of the world’s opium and heroin.

Asked if intensified engagement would lead to more American casualties, Biden said, “I hate to say it, but yes, I think there will be an up-tick.”

“As the commander in Afghanistan said, ‘We will get this done, but we’re going to be engaging the enemy much more,’” Biden said, quoting Army Gen. David D. McKiernan, commander of NATO’s International Security Assistance Force and U.S. forces in Afghanistan.

Biden met with McKiernan earlier this month during a Middle East fact-finding mission that brought the then-vice president-elect to Afghanistan, Pakistan and Iraq.

The vice president said the United States is making progress in Pakistan, where the national army has increased its level of cooperation in policing a contentious region near the Afghan border known as the federally administered tribal areas, which he characterized as an ungovernable swath of land that is home to al-Qaida and other enemy combatants.

“We’re in the process of working with the Pakistanis to help train up their counterinsurgency capability, their military, and we’re getting new agreements with them about how to deal with cross-border movements of these folks,” he said. “So we’re making progress.”

Biden also emphasized the need for laws determining how oil revenues and political power will be distributed. Biden hailed the status-of-forces agreement that took effect Jan. 1 and will guide the security relationship between Washington and Baghdad as a “strong sign” of Iraqi political movement.

“There’s progress being made on it,” he said of reconciliation among Iraq’s ethnic groups, “but we need a much stronger push, and there has to be an additional show of responsibility on the part of the Iraqi leaders that they’re able to govern.”