President Barack Obama will announce $53 million in new security assistance for the Ukrainian military, including equipment to help detect incoming artillery fire, but will not give any lethal aid to help in the fight against Russian-backed separatists, according to Reuters.

Senior Obama administration officials detailed the security package Thursday in advance of Obama's meeting with Ukrainian President Petro Poroshenko, Reuters reported.

Poroshenko arrived in the U.S. with concrete requests for weapons and other lethal military aid , but the package Obama will offer Poroshenko will provide Ukrainian forces with counter-mortar radar to help detect incoming artillery fire, according to Reuters.

The U.S. also will provide vehicles and patrol boats, body armor and heavy engineering equipment, administration officials said, Reuters reported.

Beyond $46 million in assistance, the U.S. is providing $7 million to international relief organizations to provide humanitarian aid to people affected by the conflict in eastern Ukraine, according to Reuters.

Obama also is dispatching Commerce Secretary Penny Pritzker to Ukraine next week for meetings about how Ukraine can implement reforms that can stabilize its economy and attract more investment, Reuters reported.

A senior administration official said the U.S. assessment is that Ukraine has enough such equipment and that the types of weaponry that has been discussed would be of only marginal value and would not have a decisive effect, according to Reuters.

"There's no sense that there's an effective military edge that could be given that could change the overall balance," the official said, Reuters reported. "Ukraine would be extremely vulnerable to a fully supported Russian attack."

The U.S. and its European allies have imposed several rounds of economic sanctions against Russia for its seizure of Crimea and backing of a separatist movement in eastern Ukraine, according to Reuters.