 On 12 January 2009 , at least three people , including two <unk> and one American , entered the <unk> @-@ <unk> La <unk> in <unk> and damaged just under 30 archaeological pieces , including the four La <unk> colossal heads . The <unk> were all members of an evangelical church and appeared to have been carrying out a supposed pre @-@ Columbian ritual , during which salts , grape juice and oil were thrown on the heads . It was estimated that 300 @,@ 000 pesos ( US $ 21 @,@ 900 ) would be needed to repair the damage , and the restoration process would last four months . The three <unk> were released soon after their arrest after paying 330 @,@ 000 pesos each . 
