Unable to locate a football team that went missing in a cave complex in Thailand over the weekend, police began dropping survival packages through a shaft drilled in the mountainside not knowing if anyone was there. The search for the 12 boys and their assistant coach went on for a sixth day on Friday, but efforts continued to be hampered by rain that flooded parts of 10-kilometer (6 mile) long Tham Luang cave complex in Chiang Rai province Twenty packages filled with water, food, medicine, flashlights and a note addressed to the missing team were dropped down a fissure in the cave on Friday, police said. Unsure of the boys’ location, they just hoped the boxes would reach them. “If the children find this box we want them to float the box out of the cave,” Police Colonel Kraiboon Sotsong, commander of the police’s strategic office, told reporters. “The note says: ‘If received, then reply and show on the map where you are. Everybody will quickly help.” The team went missing in the caves on Saturday despite a sign warning visitors that the maze of passages and chambers was prone to flooding. Bicycles and football cleats belonging to the boys were found near the entrance, and rescue workers think handprints inside the cave could have been left by the group. But the search has so far yielded no other trace. International rescue teams, including one sent by the United States Pacific Command (PACOM), are assisting the Thai army, navy and police in the search operation. Police have been scouring ground above in search of other ways into the cave as divers tried to find their way through the flooded passages. Thailands Prime Minister Prayuth Chan-ocha on Friday visited the flooded cave complex and urged their relatives to not give up hope. "There has to be faith. Faith makes everything a success," the countrys military ruler told families waiting outside the cave. "Faith in the actions of officials. Faith in our children who are strong and vigorous. Everything will go back to normal." The governor of Chiang Rai thanked people in Thailand and abroad for sending their support, including a US military rescue team and UK cave divers. "We will keep our effort up no matter how tired we are," Governor Narongsak Osatanakorn said.