The remarks were published on the department's website as Sessions prepares to hold a news conference in San Diego with Immigration and Customs Enforcement Director Thomas Homan.
The Trump administration has chose to refer every person caught crossing the border illegally for federal prosecution, a policy that could result in the separation of far more parents from their children at the border. "We will continue to work with our partners in each U.S. Attorney's offices to aggressively pursue prosecutions of criminal illegal entry".
Attorney General Jeff Sessions said the US will take a stricter stance on illegal crossings at the Mexico border by separating parents from children, rather than keeping them together in detention centers.
We will put you in jail.
In one recent example of how the policy works, a woman who is suspected by the Justice Department of being part of the migrant caravan that was caught in a group north of the border was charged with illegal entry to the United States and separated from the four young children who were with her.More news: Tough win for Jason Day
Sessions' visit follows a March visit by President Donald Trump to Otay Mesa to survey border wall prototypes.
Thirty-five federal prosecutors and 18 immigration judges have been re-directed to the border to handle immigration cases.
Sessions' trip marked the fourth time a high-ranking Trump official has visited the California-Mexico border region in recent months.
Justice Department officials said the two will discuss "immigration enforcement actions of the Trump Administration". Vice President Mike Pence also went to Calexico last Monday.
Sessions' call for tougher immigration enforcement came a week after the caravan, with fewer than 200 migrants, arrived at the USA border in Tijuana following a roughly month-long trek through Mexico.